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Do energy drinks cause tiredness?

Author

Olivia Carter

Published Mar 12, 2026

Do energy drinks cause tiredness?

In short - yes. The primary ingredients in almost any energy drink are caffeine and sugar. These two popular ingredients work in tandem to give you a temporary boost in energy. However, in some cases, they do the exact opposite and can leave you feeling sleepy.

Also know, what are the side effects of energy drinks?

Side Effects of Too Much Caffeine

  • Increased heart rate.
  • High blood pressure.
  • Heart palpitations.
  • Insomnia.
  • Dehydration.
  • Restlessness.

Likewise, is it bad if caffeine makes you tired? Caffeine can block the effects of adenosine, which is what makes you feel alert after your morning cup of joe. 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.

Regarding this, why do I get tired when I drink caffeine?

If drinking a cup of coffee makes a person feel tired, the effects of caffeine may be responsible. Caffeine increases alertness by interfering with certain chemical processes in the brain that regulate the sleep-wake cycle. However, once the body completely metabolizes caffeine, it can make people feel tired.

Can 5 hour energy make you sleepy?

BBC NEWS | Health | Energy drinks 'make you sleepy' Having a high sugar drink to boost energy can actually make people more sleepy, a study suggests. But after an hour, people who had such drinks had slower reactions and more lapses in concentration than those who had a no-sugar, no caffeine drink.

Is one energy drink a day OK?

That number climbed to 1,499 in 2011. As for most adults, up to 400 milligrams of caffeine a day appears to be safe, according to the Mayo Clinic. “Healthy adults who choose to drink energy drinks should not exceed one can per day,” the Mayo Clinic's Zeratsky said.

What happens if you drink energy drinks everyday?

Particularly in younger people, excessive energy drink intake has been linked to abnormal heart rhythm, heart attack, and — in some rare cases — death ( 1 , 12 , 13 ). Energy drinks are also high in sugar, which is associated with obesity, dental problems, and type 2 diabetes.

Why you should stop drinking energy drinks?

The high amounts of caffeine in the drinks can cause increased blood pressure and heart rate, while other ingredients in the drink may be responsible for the abnormal heart rhythms, aneurysms, and rarely, unexpected heart attacks. When the high wears off, the body responds like it's under stress, Springer says.

How many energy drinks is too many in a week?

Concluding from this caffeine daily intake, one should limit the energy drink consumption to 1 or a maximum of 2 cans per day. Do make sure that it should be taken in moderation and not more than once or twice a week.

How long do energy drinks last in your body?

For most people, the immediate effects of an energy drink will kick in within 10 minutes of consumption, peak at the 45 minute mark, and decline over the next 2-3 hours. Nevertheless, energy drinks and their ingredients will stay in your system for up to twelve hours.

Why am I still sleepy after sleeping?

Chances are, your morning grogginess is just sleep inertia, which is a normal part of the waking process. Your brain typically doesn't instantly wake up after sleeping. It transitions gradually to a wakeful state. During this transition period, you may feel groggy or disoriented.

Why do I feel sleepy even after sleeping 8 hours?

One of the simplest explanations is that it could be due to your body requiring more rest than the average person. However, it is also likely that your tiredness is due to the lack of quality sleep at night, rather than the quantity of it.

How can I stop feeling sleepy?

How to Stay Awake Naturally
  1. Get Up and Move Around to Feel Awake.
  2. Take a Nap to Take the Edge Off Sleepiness.
  3. Give Your Eyes a Break to Avoid Fatigue.
  4. Eat a Healthy Snack to Boost Energy.
  5. Start a Conversation to Wake Up Your Mind.
  6. Turn Up the Lights to Ease Fatigue.
  7. Take a Breather to Feel Alert.

Why am I sleepy all day long?

The most common causes of excessive sleepiness are sleep deprivation and disorders like sleep apnea and insomnia. Depression and other psychiatric problems, certain medications, and medical conditions affecting the brain and body can cause daytime drowsiness as well.

Does Red Bull keep you awake?

Sure, energy drinks may contain exceeding amounts of caffeine which keeps the mind alert. The length of time that the effect of red bull energy drinks last, vary from person. It's tempting to reach for an energy drink to try to keep yourself awake. Yes, they make you hyper and keep you awake.

Can you sleep after drinking an energy drink?

Another study found that there is a wide range of caffeine content in specialty coffees. Even decaf coffee contains caffeine! For obvious reasons, there is no use in having an energy drink before bed. The amount of caffeine in these drinks can make it hard for you to fall asleep, reducing your total sleep time.

Does coffee make ADHD tired?

It stimulates the body's central nervous system, and boosts the brain's production of a neurochemical known as dopamine, which controls the ability to focus and maintain concentration. This stimulation can cause a person to feel energized and not to feel the effects of fatigue as strongly.

Can coffee make you weak and shaky?

Too much caffeine: Healthy adults can usually safely consume 400 mg of caffeine per day, but higher doses can be harmful. However, some people are more sensitive to caffeine, so they may experience negative effects — such as shakiness, weakness, and tiredness — at lower doses.

How do you know if you are addicted to caffeine?

Here are 8 common signs and symptoms of caffeine withdrawal.
  1. Headache. Share on Pinterest.
  2. Fatigue. Many people depend on a daily cup of coffee to give them an energy boost.
  3. Anxiety.
  4. Difficulty Concentrating.
  5. Depressed Mood.
  6. Irritability.
  7. Tremors.
  8. Low Energy.

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.

Why does caffeine make me sleepy instead of awake?

It's because coffee blocks adenosine

It regulates your sleep-wake cycle. When you're awake during the day, your adenosine levels increase , eventually making you drowsy by suppressing the activity of cells in the basal forebrain. After you fall asleep, adenosine levels drop .

What is a caffeine crash?

A caffeine crash can result due to poor sleep, consuming caffeine close to bedtime, or consuming too much. It's associated with tiredness, the inability to concentrate, and irritability.

Why Does coffee make you poop?

The researchers found that ingesting caffeine led to stronger anal sphincter contractions, and an increased desire to defecate.

Why do I feel sleepy after drinking alcohol?

Why it makes you sleepy

Anyone who's ever indulged in a drink or two knows that alcohol can make you real sleepy, real fast. That's because alcohol depresses the central nervous system. It has a sedative effect that helps you relax and makes you drowsy, so you fall asleep faster.

Can coffee make you lose weight?

In the short term, caffeine can boost the metabolic rate and increase fat burning, but after a while people become tolerant to the effects and it stops working. But even if coffee doesn't make you expend more calories in the long term, there is still a possibility that it blunts appetite and helps you eat less.

Why does coffee make me tired but energy drinks don t?

Caffeine is a diuretic

“Caffeinated drinks like tea and coffee act as diuretics, causing people to void their bladders more frequently and causing dehydration. That dehydration combined with caffeine withdrawal and the adenosine buildup can make someone feel exhausted,” says Worley.

Why do energy drinks calm me down?

Stimulants, including caffeine, raise the amount of specific chemicals that your brain uses to send signals. One of these is dopamine. When you have ADHD, doctors often prescribe stimulants to help you feel more calm and focused.

Why do energy drinks give me headaches?

The Causes of “Caffeine Headaches”

When we drink coffee, or any caffeinated beverages (e.g., tea, energy drinks) the caffeine causes the blood vessels in the brain to constrict. When you stop the caffeine intake, the blood vessels in the brain dilate. This increases the blood flow and can trigger a headache.

Can energy drinks make you lose weight?

Counting calories is still the most common method people use to lose a little bit of weight. Drinking one 16 fl. oz can of an energy drink containing 230 calories means you have to eat 230 calories less of something else that day, or burn an extra 230 calories off in the gym.

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