Why Do I Get Sleepy After Drinking Coffee? (Question)

When you drink coffee, your body absorbs the caffeine in it, and when this caffeine reaches your brain, it sticks to your adenosine receptors. However, once the caffeine wears off, your body may experience a buildup of adenosine that hits you all at once, which is why coffee can make you feel tired.

  • If you drink coffee-flavored drinks that have lots of sugar but little coffee, you may actually be experiencing a sugar rush and crash, more than a caffeine boost. The primary reason why coffee makes you sleepy sometimes is likely because it’s making you dehydrated. Coffee is a diuretic. In other words, it makes you need to urinate.


Why does coffee make me sleepy immediately?

The body rapidly absorbs caffeine, so people may feel its effects within minutes. In fact, the body absorbs 99% of caffeine within 45 minutes of consuming it. When caffeine wears off, adenosine molecules can bind to their receptors, which can cause sleepiness.

Is it bad if coffee makes you sleepy?

The bottom line. Coffee itself won’t instantly make you feel tired, but the caffeine it contains may actually lead to fatigue after regularly drinking it over time. If you stick to 400 mg of caffeine per day or less and go easy on the added sugar, you should reap the benefits of caffeine and avoid its drawbacks.

Does caffeine make ADHD sleepy?

The boost that makes caffeine feel helpful during the day can also make it hard for kids to sleep at night. And being tired makes ADHD symptoms worse, not better. 3. Too much caffeine—or using it too often—can be bad for a child’s health.

Can coffee make you gain weight?

Coffee alone does not cause weight gain — and may, in fact, promote weight loss by boosting metabolism and aiding appetite control. However, it can negatively affect sleep, which may promote weight gain. Additionally, many coffee drinks and popular coffee pairings are high in calories and added sugar.

Does caffeine Work for ADHD?

Some studies have found that caffeine can boost concentration for people with ADHD. Since it’s a stimulant drug, it mimics some of the effects of stronger stimulants used to treat ADHD, such as amphetamine medications. However, caffeine alone is less effective than prescription medications.

Can coffee make you lose weight?

Caffeine alone won’t help you slim down. It may slightly boost weight-loss efforts or help prevent weight gain, but there’s no solid evidence that caffeine consumption leads to noticeable weight loss.

Can coffee make you awake?

Once consumed, caffeine is very quickly absorbed and distributed throughout your body, including to your brain. It’s here that caffeine elicits its most classic effect — helping keep you alert and awake. Caffeine accomplishes this by blocking sleep-promoting receptors in your brain called adenosine receptors.

Why does coffee affect me so much?

As adenosine levels build up, you become more and more tired. Caffeine binds to adenosine receptors in the brain, blocking their ability to signal us when we become fatigued. It also impacts other neurotransmitters that have a stimulating, feel-good effect, such as dopamine.

Does caffeine stunt your growth?

No, coffee doesn’t stunt a person’s growth. For most people, a cup or two of coffee a day doesn’t do any harm. But if you’re drinking more — especially if you’re also getting caffeine from other sources, like soda or energy drinks — you may want to cut back.

Does coffee make your belly big?

If a person drinks a lot of coffee or is under a lot of stress, then there is this constant level of cortisol floating around in the body. Over time, the body can’t bring the cortisol levels back down to normal, which can lead to an increase in belly fat.

How can I lose my stomach fat?

To battle belly fat: Eat a healthy diet. Focus on plant-based foods, such as fruits, vegetables and whole grains, and choose lean sources of protein and low-fat dairy products. Limit added sugar and saturated fat, which is found in meat and high-fat dairy products, such as cheese and butter.

Does coffee make you poop?

Coffee makes you poop during the day because it affects your digestive system so quickly. When you drink a cup of coffee, it stimulates your body to release the hormones gastrin and cholecystokinin. Both gastrin and cholecystokinin trigger the gastrocolic reflex, which stimulates your body to make a bowel movement.

Coffee Makes Me Tired? 3 Causes and How to Minimize Them

Is it truly the coffee that’s the problem? Caffeine is a stimulant that can increase your energy levels and make you feel more alert. Caffeine is the most common dietary source in the United States, with coffee ranking first. According to the National Coffee Association, over 62 percent of Americans consume coffee on a daily basis. Caffeine has a different effect on different people. Some people become fatigued with just one cup of coffee. Others can have several cups of coffee every day without experiencing any negative consequences.

What causes tiredness is the way it affects your body in certain ways.

Located in the central nervous system, adenosine is a chemical compound.

When you’re awake during the day, your adenosine levels rise, eventually causing you to get drowsy by reducing the activity of cells in the basal forebrain, which is responsible for sleepiness.

  1. Caffeine in coffee prevents adenosine receptors in the brain from absorbing adenosine, but it does not prevent the brain from producing adenosine or from forming new adenosine receptors, as is the case with other stimulants.
  2. Fatigue may result as a result of this.
  3. A diuretic is a drug that increases the frequency with which you pass pee.
  4. However, many experts believe that caffeine-containing beverages do not have a significant influence on urine output over the long term, and that they are no different from other beverages.
  5. The first thing that happens when you go to the restroom is that your body loses water.
  6. Dehydration can result in a high heart rate and low blood pressure, which are both dangerous.
  7. Cells in the body lose fluid volume as a result of dehydration.
  8. In order to combat this feeling of sluggishness, it’s easy to go for another cup of coffee, but doing so might re-start the cycle all over again.
  9. This implies that it causes particular blood vessels to constrict in certain situations.
  10. If you consume a lot of coffee, it’s possible that you’re not consuming as much water as you need be in order to stay hydrated.

Despite the fact that the National Academies’ Health and Medicine Division advocates following your thirst, they do suggest a recommended total daily water consumption to strive for:

  • For a typical adult male, 15 cups (3.7 liters)
  • For a typical adult female, 11 cups (2.7 liters).

This recommendation covers water in beverages other than pure water, as well as water derived from the food you ingest. In most cases, unless you’re suffering signs of dehydration, such as dark-colored urine and a headache, you’re getting enough water. It is possible that you will have regular sugar “crashes” after drinking coffee if you prefer to add sugar to it. This additional sugar can be found in the form of whipped cream or shots of syrup, among other things. These are frequently used as common ingredients in speciality coffee beverages.

  • After your body has used up all of the sugar it has stored, you may feel an energy drop.
  • It is possible that it will occur within 90 minutes of taking sugar.
  • Moderate caffeine consumption is defined as up to 400 milligrams (mg) of caffeine per day.
  • To further reduce weariness, stay away from coffee-based beverages that contain sweet syrups and creams.
  • It may also be beneficial to alternate one cup of coffee with one cup of water.
  • Keep in mind that caffeine may be found in a variety of foods other than coffee.
  • The overall effect of caffeine on your body is determined by the total quantity of caffeine present in your body from all sources, as well as how frequently you consume caffeine in your diet.
  • If you limit your caffeine intake to 400 mg or fewer per day and limit your intake of added sugar, you should receive the advantages of caffeine while avoiding its negative effects.

Six Reasons Coffee Can Make You Sleepy

Drinking water that is not clean and water derived from food are both included in this recommendation. In most cases, unless you’re suffering signs of dehydration, such as dark-colored urine and a headache, you’re getting enough water to drink. Sugar “crashes” may occur after drinking coffee if you want to sweeten it with actual sugar instead of sugar substitutes. Sugar can be added in the form of whipped cream or syrup in the form of shots. When it comes to speciality coffee beverages, these are frequently included as standard features.

  1. You may feel an energy drop once your body has used up all of the sugar it has stored.
  2. Sugar ingestion might result in a sugar crash within 90 minutes.
  3. Moderate caffeine consumption is defined as 400 milligrams (mg) or less per day.
  4. Avoid coffee-based beverages that contain sweet syrups or creams to further reduce weariness.
  5. It may also be beneficial to alternate between one cup of coffee and one cup of water.
  6. It’s important to remember that caffeine may be found in a variety of foods.
  7. The overall impact of caffeine on your body is determined by the total quantity of caffeine present in your body from all sources, as well as how frequently you consume caffeine in your daily life.

The advantages of caffeine should outweigh the downsides if you keep your intake to 400 mg or less per day and limit your intake of added sugar to a bare minimum.

Coffee Blocks the Effects of Adenosine

As a result of drinking coffee, the caffeine is absorbed by the stomach and small intestine and redistributed throughout the body, including the brain. When caffeine enters your brain, it attaches itself to adenosine receptors in your brain. As a sleep aid, nowadenosine can help you fall asleep faster and regulate your sleep-wake cycle. Your brain does not process adenosine when caffeine attaches to the receptors in your brain, but this does not indicate that your brain ceases to produce adenosine as a result of the caffeine binding.

Coffee is a Diuretic

In layman’s words, consuming a cup of coffee may result in you having to use the restroom more frequently. It is possible that you will not notice anything if you drink a normal amount of coffee (two to three cups), but if you drink four or more cups, you may find yourself going to the lavatory. If you lose more fluids than you are consuming, you may become fatigued as a result of dehydration taking effect. Thirst, a dry mouth, disorientation, dry skin, and a lack of perspiration are all signs of dehydration, as are other symptoms.

According to Harvard Medical, while caffeinated beverages may increase the number of times you visit the toilet, the water in the drink still adds to your overall fluid intake.

It is possible that you will need to drink more water than normal if you are exercising, unwell, or experiencing hot, humid, or cold conditions.

It’s the Sweetener, Not the Coffee

If you consume coffee that has been sweetened with whipped cream, honey, syrup, or plain old sugar, you may experience a sugar crash that leaves you feeling exhausted. When your body consumes more sugar than it is accustomed to, insulin is secreted to counteract the excess. However, insulin also causes your blood glucose levels to decline, which is important since your blood glucose, commonly known as your blood sugar, is your body’s primary source of energy. When a result, as your blood glucose levels drop, you experience a loss of energy that might make you feel exhausted.

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It’s possible that it’s not simply the sugar in your coffee that’s to blame.

Sugary beverages, in particular, are particularly easy to overindulge in since they do not fill you up the way food does. Having some protein might help to restore equilibrium to your blood sugar levels if you are experiencing a sugar crash.

It’s the Mold, Not the Coffee

Even though it’s disgusting to think about, mold infection is the reason you can feel weary after drinking a cup of coffee. In a 2003 National Institutes of Health research, 60 samples of raw, unroasted coffee beans (also known as green coffee) from Brazil were studied. It was discovered that “practically all samples (91.7 percent) were infected with mold (sic)” according to the investigation. Other NIH studies looked for mycotoxins in coffee samples, which are a byproduct of microfungal activity.

In addition, study conducted in 2013 found a relationship between mycotoxins and chronic tiredness.

Other signs and symptoms include dizziness, trouble thinking and focusing, and fatigue.

Caffeine Affects Stress

Stress may keep you up at night, as anybody who has experienced stress-induced sleeplessness will attest. Stress, on the other hand, might cause you to feel sluggish and drained throughout the day. If you’re feeling anxious, you may want to get some sleep to help you process the situation, because sleep is when you consolidate emotional memories. We get stressed as a result of the release of the stress hormone cortisol, which tells our bodies to go on high alert in response to a perceived stressor, causing us to feel anxious.

We become more alert when the hormone adrenaline travels throughout our bodies, causing our hearts to beat quicker and our breathing to become more rapid.

This implies that even if you consume the same amount of coffee every day, you may experience tension afterward.

Caffeine Withdrawal Symptoms

It’s probable that you’ll experience the affects of caffeine withdrawal if you’re a habitual coffee drinker who suddenly stops drinking it. When you stop drinking coffee, you may experience a variety of symptoms including sleepiness, nausea, irritabilty, and a difficulty to focus. Within 12 to 24 hours of your last caffeine use, you will begin to experience withdrawal symptoms. Symptoms may last only a few days or they may linger for many weeks, depending on how much caffeine you drink on a regular basis.

Reduce your caffeine intake by one-fourth of a cup every two to three days, or switch to green tea to reduce your caffeine intake. Continue to reduce your caffeine intake until you are no longer ingesting it.

Frequently Asked Questions

You’ll likely feel the caffeine kick in as little as 10 minutes after consuming the beverage, and the quantity of caffeine flowing in your blood will peak between 30 and 90 minutes after drinking it. While you may see a reduction in the effects of caffeine within a few hours as the caffeine is digested, it might take several hours for caffeine to be totally eliminated from your system.

Can caffeine not affect you?

If you drink caffeine on a daily basis, you may find that you no longer notice the effects of your typical cup of coffee as you develop a tolerance to it. Caffeine tolerance might also differ from person to person.

Is caffeine bad for your heart?

Numerous studies have been conducted to investigate the relationship between caffeine, coffee, and coronary heart disease, with varying degrees of success. It is possible that external influences, such as other dietary choices, had an impact on the outcomes. According to the American Heart Association, consuming one or two cups of coffee a day should be considered moderate. “Caffeine is more commonly linked with benefit than harm for a range of health outcomes across several measures of exposure, including high vs low, any versus none, and one more cup a day,” according to a 2017 assessment of the literature.

How does caffeine affect your sleep?

Having a cup of coffee right before bed might prevent you from obtaining a decent night’s sleep. If you consume caffeine six hours before bedtime, you may still be feeling the affects of the caffeine when you retire for the night. When it comes to adults, the half-life of caffeine, or the amount of time it takes for your body to eliminate half of the caffeine you consume, ranges from three to seven hours.

How do you flush out caffeine?

If you have a slight caffeine overdose, you may find that drinking more water, exercising, and eating are all popular advice. Drinking herbal tea and engaging in breathing exercises may also assist you in feeling more relaxed.

Did We Help?

Coffee includes caffeine, which is invigorating, but it has its limits. When you are experiencing the consequences of adenosine buildup, dehydration, low blood sugar, and other factors, you may feel weary. Even though the causes for feeling drowsy might vary, having a better night’s sleep may be the solution to your problem.

Does coffee make you tired? Here’s why

Coffee is used and relied upon by a large number of individuals on a daily basis. Many people who drink caffeine from coffee do so in order to boost their energy and enhance their concentration. Caffeine is the most extensively ingested stimulant in the world. Having said that, it does not impact everyone in the same way. Some people, for example, may consume many cups of coffee throughout the day with little to no negative consequences. Others may experience negative side effects even after consuming a single cup of coffee.

There are several reasons why drinking a cup of coffee might make someone feel tired, including the fact that:Coffee itself does not make people tired, but the caffeine in coffee and its effects on the body can sometimes cause tiredness.Some of the reasons why drinking a cup of coffee might make someone feel tired include the fact that:

Caffeine blocks adenosine receptors in the brain

Adenosine is a substance produced by the brain that has an effect on the sleep-wake cycle. In the awake state, adenosine levels rise, whereas they fall during sleep. As part of the normal function of the brain, Adenosine molecules attach to certain receptors, slowing down the activity of the brain in preparation for sleep. This is prevented by caffeine’s binding to adenosine receptors, which blocks the release of dopamine. Caffeine is absorbed quickly by the body, so people may see its effects within minutes of ingesting it.

The effects of caffeine will begin to fade once the caffeine has been completely metabolized by the body.

Despite the fact that it inhibits the activity of adenosine receptors, it has no effect on the synthesis of new adenosine molecules.

Some people build a tolerance to caffeine

People who consume large amounts of coffee and other caffeinated beverages on a daily basis may acquire a tolerance to them. Because caffeine interferes with the function of adenosine receptors, the body responds by producing more adenosine receptors to offset the effects of excessive caffeine ingestion. In a tiny study, researchers looked at the effects of continuous caffeine consumption on the cycling performance of 11 physically active people who were participating in a cycling competition.

After 15 days, however, the effects of the caffeine began to wane and the person began to feel better.

Further evidence suggests that continuous caffeine intake has little effect on how the body absorbs or metabolizes caffeine, according to other study.

Caffeine increases blood sugar levels

Caffeine tolerance can develop in those who consume large quantities of coffee and other caffeinated beverages on a daily basis. Caffeine inhibits adenosine receptor function, thus the body responds by producing more adenosine receptors to counteract the effects of frequent caffeine intake. Using 11 physically active people who participated in a short cycling test, researchers conducted a brief study to see what influence continuous caffeine consumption had on their riding performance. Following caffeine consumption, the individuals’ heart rates were higher at the start of the research, and they exerted more cycling power.

Following these findings, it appears that those who drink caffeine on a daily basis can become more resistant to its stimulating effects. Further evidence suggests that continuous caffeine intake has little effect on how the body absorbs or metabolizes caffeine, according to previous study. *


Drinking coffee before going to bed may cause people to have difficulty falling asleep at night. According to the authors of a 2013 study, people should refrain from consuming coffee at least 6 hours before they intend to go asleep to avoid insomnia. A 2016 study found a link between increased caffeine consumption and more severe insomnia among 234 middle school students from South Korea, according to the researchers.


Caffeine, which is present in coffee, may have negative impacts on people’s mental health. Jitteriness and anxiety can be induced by large quantities of caffeine (more than 400 mg per day, for example). Individuals suffering from panic disorders and depression may have anxiety-related symptoms if they consume large amounts of coffee.

Cardiovascular effects

It is possible that a person who consumes caffeinated coffee would have transitory increases in heart rate and blood pressure. Current study, on the other hand, shows that mild-to-moderate coffee use may be beneficial to heart health. Following the completion of a 2017 study including 557 participants in Brazil, researchers discovered data that suggests that drinking one to three cups of coffee per day may lower risk factors for cardiovascular disease in a group of people. According to the findings of a 2019 study, drinking more than six cups of coffee each day may raise the risk of cardiovascular disease.

Cancer prevention

According to the authors of a 2017 review research, there is evidence to show that increasing coffee intake may be associated with a decreased risk of hepatocellularcarcinoma. This is a form of liver cancer that has been identified. Additionally, according to a study published in 2019, coffee components such as caffeine, trigonelline, and chlorogenic acid are protective against the advancement of gastrointestinal and liver cancer. More study, however, is required to prove the relationship between coffee use and the chance of developing cancer.

Other effects of drinking coffee

Other potential side effects of coffee use include:

  • Increased alertness, jitteriness or restlessness, dizziness, migraines, thirst, stomach discomfort, and frequent urination are all possible side effects.

If drinking a cup of coffee causes a person to feel weary, it is possible that the effects of caffeine are to blame. Because it interferes with some chemical processes in the brain that govern the sleep-wake cycle, caffeine has been shown to improve attentiveness. However, once caffeine has been entirely metabolized by the body, it might cause people to feel fatigued. It is dependent on hereditary and lifestyle variables as to how quickly caffeine is metabolized by the body of a certain individual.

Sleepy After Coffee? Here’s the Fix.

Consider the following scenario: This Monday morning, the rain is falling outside your window, and there’s nothing more you want to do than draw the covers over your head and drift back to sleep in your dreams. Due to unforeseen circumstances, the weekend has come to an end. It’s time to get back into the swing of things at work, and if you click the snooze button one more time, you’ll run the danger of being late for work. What’s more, Monday’s secret agenda has you questioning whether or not you really need this work and whether or not you can slide back into a deep slumber once more on Monday.

  • It’s past time to get up.
  • Consider the following scenario: Your next-door neighbor has a boiling hot, delicious cup of sunlight waiting for you in the other room.
  • It’s fine if you’re a little chilly when you first get out from beneath the covers since this will quickly warm you up.
  • That’s how it feels to be comfortable.
  • Outside of your bed, coffee is nothing more than a fantasy.
  • If you’re a regular coffee user, like myself, you’ve probably had one or two too many Mondays in a row where this happens.

But I’m willing to bet you didn’t envision this. Despite the fact that you’ve been sipping coffee all day, you’re having difficulty keeping your eyes open. In fact, you’re ready to snuggle up and take a sleep right there at your computer desk. WHY?

3 Reasons Why You Feel Sleepy After Coffee

1. When the caffeine wears off, the adenosine will make you feel drowsy. It is a neurotransmitter that produces weariness when the amount of oxygen and nutrients reaching the brain is insufficient. Caffeine prevents adenosine from reaching the receptors in your brain that are responsible for receiving it. While blocking adenosine from reaching your brain, your body continues to produce the neurotransmitter in order to compensate. As a result, as the caffeine wears off, you have a build-up of adenosine in your system, which causes you to become tired all at once.

Caffeine dehydrates the body and causes fatigue.

It is possible that after drinking a cup of coffee, you have discovered that peeing is your best buddy.

According to this model, the cycle looks somewhat like this:

  • When I sip, you sip, we sip, and we sip, we have to go to the restroom shortly after
  • Whenever you go to the bathroom, your body begins to lose water. The loss of water in your body results in a thickening of your blood. Similarly to how thick molasses soaks up the cake in a sluggish drip, thick blood flows more slowly through the arteries and veins of the body. Your blood’s flow slows as a result, resulting in less oxygen being given to your body. You become lethargic and indolent as a result of a lack of oxygen. When we are feeling lethargic and lazy, there is no better way to perk ourselves back up than to go for another cup of coffee. And thus the cycle begins once more.
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Make an effort to drink one glass of water for every cup of coffee you take in. This will assist in reducing the symptoms of tiredness by keeping you hydrated and, even better, providing a more energized trip. 3) If you enjoy sweet additives, you’ll be the one dozing off in the middle of the evening. Instead of worrying about the sugar crash that’s coming to a body near you, try thinking about the sugar crash that’s coming to a body near you. My focus is on your body, namely your body. Sugar is metabolized far more quickly than coffee, and as a result, it depletes your body’s energy reserves much more quickly than coffee.

If you’re a member of the unusual breed that falls asleep after your morning cup of coffee and you’re seeking for a quick remedy, consider the following suggestions.

An unmistakable signal that it’s time to get some coffee.

Caffeine Makes Me Tired – Is There Something Wrong With Me?

This is a fact-based piece of writing. These experts, who include qualified nutritionists, dietitians, and medical professionals have authored and fact-checked this article. Based on scientific investigations and research, the material in this article has been compiled. It is intended to be honest, unbiased, and objective, and viewpoints from all sides of an issue are expressed if there is a dispute in the content of the article. In this article, the scientific references (indicated by the numbers 1, 2, 3, and so on) are clickable links to peer-reviewed research materials on the subject matter being addressed.

  1. However, if you aren’t, and your doctor has prescribed you a number of different drugs, there’s a strong probability that at least one of them hasn’t worked as well as it should have.
  2. What could possibly be wrong with a prescribed medication?
  3. Everyone’s reaction to a medicine is different, and this is true for everyone.
  4. Caffeine is considered to be a drug as well.
  5. However, just like with any other substance, not everyone’s body reacts to coffee in the same manner.
  6. Caffeine, on the other hand, appears to cause sluggishness in some persons rather than alertness.

Is it true that caffeine might make you tired? Isn’t it a stimulant that enhances alertness and concentration? Yes, it is correct. However, there are a variety of additional elements that might be at play.

What Caffeine Does In the Body

When you ask people what caffeine is, you’ll receive fairly similar replies, such as “it wakes you up,” “it makes you more alert,” or “it gives you more energy.” Caffeine is a stimulant that helps individuals stay awake and attentive. However, those are samples of what caffeine is capable of doing. The definition of marijuana is a stimulant that interacts with the central nervous system (CNS). We ingest a large amount of caffeine that is naturally occurring, manufactured and extracted from plants such as the coffee plant (which produces coffee beans, of course), the tea plant (Camellia sinensis), or the cacao plant (Theobroma cacao) (which produces the cocoa beans used to make chocolate).

Because the natural and synthetic forms of caffeine are chemically similar, they function in exactly the same manner when consumed.

It is the way caffeine interacts with crucial brain chemicals that is the secret to its effectiveness, just as it is with all other stimulants.

A1 Adenosine Receptors

Adenosine molecules are produced by the body throughout the day. When we engage in physical or mental activity, our bodies make more of them every hour of activity. Adenosine functions similarly to a neurotransmitter in that it transmits information throughout the brain – and one of the messages it transmits is the requirement for rest. Because of this, as the day goes, we get increasingly weary and the levels of adenosine in our bodies rise. Adenosine transmits messages to the brain by attaching to specific sets of receptors known as adenosine receptors, which are named after the amino acid adenosine.

One thing, though, can prevent those “tiredness” messages from being delivered: caffeine can be consumed in little doses.

It attaches to the A1 receptors and prevents them from functioning.

For this reason, coffee only has a short duration of effect on your juice, and a 5-Hour Energy only has a duration of effect on your juice of roughly five hours.

A2A Adenosine Receptors

In addition, adenosine binds to A2A receptors in the brain. Unlike A1 receptors, they are not involved in the process of becoming weary; rather, they are crucial for regulating the amount of feel-good hormones and neurotransmitters, such as serotonin and dopamine, produced in the brain. They also help to keep adrenaline levels under control, popularly known as the “fight-or-flight hormone.” Coffee, as a stimulant, promotes the release of serotonin, dopamine, and adrenaline in the bloodstream.

That’s why the caffeine in coffee or an energy drink makes us feel so terrific for a short period of time after drinking it.

Caffeine also provides protection against adenosine, albeit this protection lasts only until the caffeine dissociates from the receptors and is metabolized by the body.

Blood Vessels

There are A2A receptors in the brain, as well, and adenosine interacts with these receptors. Unlike A1 receptors, they are not involved in the process of becoming weary; instead, they are crucial for regulating the amount of feel-good hormones and neurotransmitters, such as serotonin and dopamine, produced in the body. These supplements also help to keep adrenaline levels under control, popularly known as the “fight or flight hormone.” – With its stimulating properties, coffee induces the release of serotonin, dopamine, and adrenaline in the brain.

That’s why the caffeine in coffee or an energy drink makes us feel so terrific for a short period of time after we consume it.

Also protected against adenosine, but only for a short period of time until caffeine unbinds from the receptors and is digested by the body, which takes around an hour.

Why Caffeine Can Make You Feel Tired

Now that you know what caffeine works, let’s take a look at why it appears to make certain individuals feel weary from time to time. According to the results of the investigation, there are several viable options.


Yes, we’re back at it again, this time discussing adenosine. You’re probably aware that coffee interferes with adenosine’s capacity to make us feel fatigued. Adenosine, on the other hand, does not simply give up and go home; instead, it waits. In fact, the brain continues to generate it. As a result, when the caffeine has finally left your system, the accumulated adenosine binds itself to the A1 receptors, causing you to feel much more fatigued than you would normally be. In many respects, it is comparable to getting a sugar rush, except that the peak is nearly always followed by a collapse.

Speaking of Sugar…

Although it may appear like caffeine is making you weary, it is possible that you are actually experiencing a sugar crash. Many of us enjoy our sodas sweet, and we enjoy our coffee with lots of sugar. Due to the high sugar content in our diets – not to mention all of the delicious sweet stuff that is included in coffee beverages – our bodies are forced to create greater levels of insulin. As a result, the insulin produces a decrease in blood sugar (glucose) levels. When our blood sugar levels drop, we become fatigued, nervous, and irritated.

Our bodies are just collapsing as a result of the first sugar surge.

Natural, non-nutritive sweeteners such as monk fruit extract, can be used to alleviate the problem of excessive caffeine consumption in coffee.

Super Coffeeready-to-drinkketo-friendlycoffee is a wonderful choice since it already includes monk fruit sweetener as well as MCT oil, which helps keto dieters burn fat more effectively while also providing additional energy. Super Coffee is available at most grocery stores.


Caffeine is one of the drugs that the body can develop a tolerance to, and it is no exception. When it comes to coffee, the more accustomed you become to it, the less impact it will have on your heart rate, blood pressure, and most crucially, your energy levels. In other words, coffee will no longer be able to keep you awake in the same manner it did before you began consuming large amounts of it. There’s also an intriguing twist to the story. When you ingest a big amount of coffee on a daily basis and it consistently inhibits the adenosine receptors, the brain responds by simply producing more adenosine receptors in order to compensate for the loss.

  1. What is the best way to overcome caffeine tolerance?
  2. For coffee enthusiasts, it is probably more sensible to lower their caffeine intake by moving from black coffee, espresso, and other caffeinated beverages to water, fruit juice, or decaf coffee (which only contains a fraction of the caffeine in coffee).
  3. There is, however, a catch-22 to be aware of, and it is one that you may have already encountered.
  4. It can cause negative symptoms such as agitation, headaches, and, you guessed it, weariness, just like any other sort of drug withdrawal.


One of the most well-known effects of coffee is that it might have diuretic effects in certain individuals. A nice way of explaining that it causes you to pee more frequently than normal. After drinking more than three or four cups of coffee each day for several days, the impact becomes more noticeable among coffee enthusiasts. When you pee a lot, you’re more likely to be losing more fluid than you’re ingesting – and this can lead you to get dehydrated, which can result in dizziness, dry mouth, and – yep – weariness, among other symptoms.

Additionally, consuming meals that are high in water content, such as vegetables and fruit, can assist you in getting enough water into your body.


While under stress or anxiety, your body goes into high alert and releases the stress hormone cortisol and the “fight-or-flight” hormone epinephrine, which prepares you to flee or fight (better known as adrenaline). These chemicals are responsible for the rise in heart rate and blood pressure that we have all experienced when under stress. You are likely to feel more exhausted than normal immediately after the tension or worry has been removed. This is because you are no longer under stress or anxiety.

It causes the body to create more cortisol and adrenaline, which is beneficial.

In other words, that cup of coffee or energy drink may actually make your body feel anxious, and as the caffeine wears off, your body’s natural response is to get exhausted. People who already suffer from stress and anxiety are more susceptible to the effects of the medication.


The stress hormone cortisol is released, as is the “fight-or-flight” hormone epinephrine, when you’re stressed or nervous, and your body goes into high alert (better known as adrenaline). Because of these hormones, we all experience an increase in heart rate and blood pressure when we are anxious. Instantaneously following the release of tension or anxiety, you will not only feel “better,” but you will also be more exhausted than normal. You can probably guess what happens when you consume coffee or other caffeinated liquids.

Caffeine consumption from any source, according to a study conducted at The Ohio State University, doubles the body’s natural amounts of these hormones.

People who already suffer from stress and anxiety are more likely to be affected by this.

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Caffeine Makes Me Tired, So I Asked a Sleep Expert to Explain Why

Twenty20 I realize that caffeine is a stimulant, but bear with me. It should not, by definition, cause a person to become fatigued. A mid-afternoon cold coffee, on the other hand, I swear, sometimes makes me feel more ready for a sleep than anything else—forget about feeling stimulated. What’s going on? Is it true that caffeine might make certain people sleepy? Or am I going insane? Assuring me that I was not going insane was Vanessa Rissetto (MS, RD, CDN, and co-founder of Culina Health). “The most well-known impact caffeine has on the brain is alertness, but it isn’t the only one,” says Michelle Worley, a licensed nurse and Director of Clinical Operations at Aeroflow Healthcare, who also handles the company’s sleep therapies.

Let’s have a look at this.

8 reasons caffeine might be making you tired

1. You’re consuming an excessive amount of it. On average, how many cups of coffee, cans of Red Bull, or pots of tea do you consume in a given day? Is it possible to have more than three? That might explain why you’re feeling weary; there’s a lot of caffeine in your system. “If you consume coffee in excess of three cups or more per day, it might cause you to go to the toilet more frequently, resulting in dehydration, which can make you feel dizzy and tired,” explains Rissetto. 2. Excess caffeine interferes with the function of adenosine receptors.

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Adenosine is responsible for making us feel drowsy.

However, there is a catch!

You’re left with an adenosine buildup after the caffeine has worn off, making you feel even more exhausted.” Three, the sugar that you use is the true culprit There are two types of people in this world: those who put sugar in their coffee and those who put sugar in their coffee and those who take their coffee with sugar.

  • As Rissetto points out, “if you load your coffee with sugar and sweeteners, when that wears off, you might have a sugar crash, making you feel sleepy and sluggish again.” Additionally, highly sweet creamers and energy drinks with a long list of extra ingredients are included in this category.
  • Ew.
  • Mycotoxins, which are poisonous chemicals created by some types of molds and found in coffee, have been discovered in research.
  • Molds that are capable of producing mycotoxins can be found on a wide variety of foods, including cereals, dried fruits, nuts, and spices.” Eek.
  • To prevent being a victim of this mold, attempt to diversify your coffee consumption by visiting different coffee shops or purchasing different kinds.
  • 5.
  • Do you consume a large amount of coffee on a regular basis?

As a result, the lightning shock of energy you used to feel after your first espresso is no longer as strong now that you’re drinking two shots every day.


“Some people might be more susceptible to coffee than others,” says Rissetto.

The effects of caffeine on people who are sensitive to it linger longer, and their symptoms may last for many hours.” According to Worley, your genes may even cause you to metabolize coffee in a significantly different way than others.

People suffering from anxiety disorders may experience worsened unpleasant symptoms when they consume caffeine, whilst for others, a few sips of coffee may feel like several cups of coffee due to the increased effects of the caffeine.

You’re suffering from coffee withdrawal symptoms.

“If this occurs, and a person attempts to abruptly and totally eliminate caffeine from their diet—a process known as ‘going cold turkey,’ they may experience a range of symptoms ranging from headaches to exhaustion to depression.” So, in this instance, it’s possible that the lack of caffeine is causing you to feel tired.

“Continue to reduce your caffeine intake until you are no longer ingesting it,” Rissetto advises.

Caffeine has diuretic properties.

Here’s a bit additional information about that: If you drink only one cup of coffee, caffeine might dehydrate you—it all depends on your body (remember6).

“Caffeinated beverages, such as tea and coffee, have diuretic properties, forcing people to urinate more often and resulting in dehydration. Someone who is dehydrated, as well as someone who is experiencing caffeine withdrawal and adenosine accumulation, may feel weary,” adds Worley.

How long does caffeine stay in your system?

To fully comprehend the effects of caffeine on your body, it’s essential that you realize how long the molecule may be in your system: Coffee may begin stimulating the body as soon as 15 minutes after consumption and can remain in the bloodstream for up to three or four hours after that, according to Worley. That indicates that for the most majority of healthy individuals, it is acceptable to drink up to 400 mg of caffeine per day, which is equivalent to around four cups of coffee.

How can we prevent being this tired when we just want to be awake?

The problem is this: Both experts believe that, when consumed in moderation, caffeine may be used to benefit the body’s ability to battle weariness. “Keeping track of the quantity of caffeine you eat on a daily basis is an excellent place to start,” adds Rissetto. Combine this with regular physical activity and water drinking. “Some techniques to stay alert without the ‘crash,'” advises Worley, include “switching from normal coffee to decaf or tea, gradually cutting back on caffeine to prevent feelings of withdrawal,” among other things.

Alternatively, as previously suggested, consider substituting normal sugar with monk fruit sweetener or simply drinking it without anything at all!

How does caffeine affect sleep?

For example, according to Worley, “since coffee is widely used for the surge of energy it gives, which is made possible by suppressing the brain’s sleep-inducing hormones, it should come as no surprise that it might make it more difficult for individuals to sleep.” Caffeine users should cease taking caffeine at least seven hours before they want to sleep in order to have the highest chance of getting a decent night’s sleep.” Yes, you might want to rethink that lovely post-dinner espresso shot you were planning on taking.

The overall consensus

The most essential thing to remember about caffeine is that, despite the ease with which it may be obtained, it has a significant impact on our bodies. It has the ability to awaken us and make us feel more alert. And if we consume too much of it—especially if we are particularly sensitive, tolerant, or retreating from it—coffee may have negative impacts on our health, leaving us feeling exhausted. So be aware of how much you’re consuming. Continue to keep note of the types of caffeine you consume and work your way up from there.

Does your morning cup of tea taste like it’s been soaked in sugar?

Investigate your behaviors, make notes, and build a plan from there.RELATED: Why You Shouldn’t Drink Coffee on an Empty Stomach, According to a NutritionistPureWow may get income from affiliate links included in this article.

Why Coffee Can Make You Tired

Coffee consumption is common around the world, but mainly in the United States. Approximately 75% of individuals in the United States consume coffee, with almost 50% doing so on a regular basis. Coffee includes caffeine as well as other substances that, when combined, promote alertness and enhance mood. A large number of individuals as a result use coffee in their morning rituals as a way to help them feel more alert and prepared for the day.

Despite the fact that coffee is a stimulant, some people find that consuming it does not provide them with the results they want. Here, we’ll go over some of the possible reasons why drinking coffee might make you feel tired rather than awake, as well as what you can do to combat these effects.

Why Does Coffee Make You Tired?

The following factors may contribute to your feeling sleepy after drinking coffee: sleep deprivation, caffeine tolerance, dehydration, adenosine levels, blood sugar fluctuations, and individual variances in caffeine metabolism.

Sleep Deprivation

More than one-third of Americans are sleep deprived and do not get the required minimum of seven hours of sleep every night, according to the National Sleep Foundation. Despite the fact that coffee might give a fast pick-me-up, it is not a sufficient replacement for sleep. Sleep deprivation can impair awareness, cause response times to slow down, and have a negative impact on thinking. In an attempt to combat fatigue, increasing one’s coffee consumption may backfire. Ingesting an excessive amount of coffee might have a bad affect on sleep, making you feel tired the next day.

Because you are feeling more weary, you drink more coffee, but this coffee interferes with your sleep, causing you to feel even more fatigued in the long term.

Caffeine Tolerance

It is likely that, rather than making you weary, coffee is just not providing you with the same level of alertness that it used to. Caffeine can initially boost your mood and response times, as well as your physical performance, when consumed in moderation. Those who take caffeine on a regular basis, however, acquire a tolerance to it, in a manner similar to how individuals develop a tolerance to alcoholic beverages. Therefore, ingesting the same quantity of caffeine will not generate the same favorable benefits over time, and drinking additional coffee to attempt to recover the positive effects of caffeine may have detrimental impacts on your sleep as a result of this.

Symptoms of caffeine withdrawal include headaches, reduced alertness, and a general sensation of fatigue.


Coffee is considered an adiuretic, which means that it might increase your desire to urinate and cause you to lose more fluid. If these excursions to the bathroom keep you awake throughout the night, you may wake up feeling more exhausted the next day. Fatigue can also be caused by mild dehydration, which is a condition that can occur on its own. It has been suggested that mild dehydration can impair cognitive performance, impair memory, increase anxiety, and increase tension. Coffee may be more likely to affect hydration in people who are not regular coffee drinkers, and it may have little to no effect until a certain level of caffeine is reached, according to some research.

Blood Sugar Changes

If you drink coffee first thing in the morning, it may increase your risk of insulin resistance and reduce your body’s capacity to handle glucose. Because of this, you become more sensitive to sugar or carbs contained in your drink or food, and your blood sugar may temporarily spike as a result. High blood sugar levels, which are most frequent in persons with diabetes or prediabetes, are connected with increased sensations of weariness, which is particularly prevalent in women. Even if your blood sugar does not rise to clinically dangerous levels, you may experience greater weariness as a result of low blood sugar levels following a drop in your blood sugar levels.

Blood sugar levels peak and then plummet in the hours following a sugar intake, and this plummeting blood sugar may have an impact on your energy levels. If you suspect that you may have diabetes or other blood sugar issues, schedule an appointment with your doctor immediately.

Adenosine Levels

Adenosine is a substance that is released in greater quantities when we are sleep deprived and is essential in the production of tiredness. Coffee increases alertness and decreases weariness by inhibiting the action of adenosine receptors, which prevents the chemical from exerting its sleep-inducing properties. Researchers believe that the body adjusts for this impact by raising its sensitivity to the neurotransmitter adenosine. Once the effects of the coffee have worn off, the accompanying spike in blood sugar levels might produce tiredness and physical weariness in some people.

Caffeine Metabolism

Nobody processes caffeine at the same pace as everyone else. If you have a sluggish caffeine metabolism, caffeine may not make you feel as awake as it does for other individuals. On the other hand, if you metabolize caffeine rapidly, it may not have as much of an influence on you or it may wear off more quickly, resulting in sensations of tiredness occurring sooner. There are a variety of factors that influence how rapidly a person metabolizes caffeine. Cigarette smoking accelerates the metabolism of caffeine.


Even though additional research is needed, researchers have shown that genes have a role in the way that an individual reacts to caffeine. Specific genes may predispose you to the negative effects of caffeine, such as anxiety and sleep disturbance, depending on your genetic makeup. If coffee use has a detrimental influence on your sleep, you may suffer more daytime fatigue as a result.

How to Maximize the Benefits of Coffee

It is possible to enhance the advantages of coffee while also limiting the potential negative effects of coffee by taking a variety of steps.

Get Enough Sleep

Despite the fact that coffee promotes alertness, it has limited impact on higher cognitive functions, and it cannot be relied on to completely cover underlying lethargy. If you are experiencing fatigue despite drinking coffee, you may be suffering from sleep deprivation. You might want to consider sleeping for a longer period of time or checking your sleep quality to determine if you are having unrefreshing sleep while spending a significant amount of time in bed.

Drink Coffee Strategically

Coffee consumption within six hours before bed has been shown to interfere with sleep, so try restricting coffee consumption to the morning and opting for sleep-promoting items in the evening instead. The Food and Drug Administration of the United States recommends that people consume no more than 400 mg of caffeine per day, which is equal to roughly four cups of coffee. Individual sensitivity levels to caffeine varies, so if you discover that caffeine is having a detrimental influence on your health, it may be beneficial to lower the quantity of caffeine you are consuming.

Cut Back on Added Sugar

Keep an eye on what you’re eating with your morning coffee, as well as how much sugar or sweetener you’re adding to it. Drinks such as coffee, in many areas of the globe, have evolved into hidden sources of additional sugar in a person’s diet.

Consuming sugar might cause fatigue in persons with diabetes who are already fatigued. Additionally, caffeine use can have a detrimental influence on the body’s capacity to appropriately control sugar, which might lead to an increase in the amount of exhaustion that results.

Stay Hydrated

It is important to drink lots of water in order to prevent the possible dehydration that might occur with taking large levels of caffeine. This is especially important if you do not drink coffee on a daily basis, since you may be more susceptible to the diuretic effects of the beverage.

  • It is important to drink lots of water in order to prevent the possible dehydration that might occur while taking larger levels of caffeine. In particular, if you do not drink coffee on a daily basis, you may be more susceptible to the diuretic effects of the beverage.

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