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How Long Does Caffeine Last? (All The Facts)

How Long Does Caffeine Last? (All The Facts)

Caffeine is a natural drug that can help you manage your everyday activities, chores, and, most importantly, work. It also boosts your physical strength, which allows you to do things with vigor. With the positive effects that caffeine can bring to your body, it’s no surprise that it’s the primary ingredient in energy-boosting drinks that you consume.

That said, you might be wondering: how long can does caffeine last in your body?

Caffeine primarily stimulates your central nervous system. It improves your mood, boosts your energy levels, and keeps your concentration at its peak. If you consume a sensible 40mg of caffeine, its effects can last for 5 hours of half-life. It stays longer than you can imagine!

To understand more about the caffeine progress and how long caffeine lasts, read on and find out.

How Long Does Your Body Need to Metabolize Caffeine?

Caffeine is a psychoactive drug that provides a lot of benefits to your body. It’s a common ingredient for most foods and beverages. In general, your body will take around 5 hours to metabolize the half-life of caffeine, though it may differ based on various factors, such as your caffeine tolerance.

Caffeine improves your mood, increases your energy levels, heart rate, and blood pressure. That’s the reason why you feel a kick in every sip. It’s a quick energy booster, and you will notice its effect in just a minute. It can last depending on your caffeine metabolism.

Process of coffee roastery.
Caffeine metabolism varies from one person to another

In general, your body needs at least 5 hours to digest the half-life of caffeine. For example, if you consume 50mg of caffeine, there’ll still 25mg of caffeine in your system after five hours.

There are several factors that affect your caffeine metabolisms. The factors include your age, health condition, and even genetics. Depending on that, the duration that you feel the effects of caffeine may vary. Besides that, if you’re a child or pregnant, it may be advisable for you to avoid caffeine.

Personally, I would recommend energy drinks that contain at least 50mg to 100mg of caffeine. It’s easier to digest and helps you maintain the balance in your system.

When Can you Feel the Effect of Caffeine?

The effects of caffeine can normally happen as you get your first sip. And you will feel its peak after 15 to 45 minutes. This caffeine can quickly metabolize in your liver after five hours.

A woman with a contemplative look.
How long will it take to feel the effect of caffeine?

The strongest effect of caffeine is usually felt during this time. Once you consume caffeine, you will feel more awake and energized. That said, it’s important to note that overconsumption of caffeine is not ideal. Consuming too much can make you feel less motivated, fatigued, and experience an increase in heart rate and blood pressure.

For your reference, the FDA recommends a daily caffeine limit of 400mg. SO make sure your consumption doesn’t go over that limit as keeping your consumption at a minimum can help you regulate your overall health.

What is Caffeine Tolerance?

Caffeine tolerance refers to the ability of your body to respond to the caffeine that you take. Continuously increasing your caffeine consumption can lead to tolerance. It means your body no longer feels absorb the nutrients and benefits of caffeine. What you do is increase your caffeine consumption.

A man looking at his tablet.
Caffeine can definitely help you power through your tasks.

There are actually two sides to your body’s caffeine reaction. If you have a low tolerance to caffeine, you will feel extreme alertness, mood improvements, as well as motor development even with a small amount of caffeine.

On the other hand, high caffeine tolerance can help you manage highly caffeinated drinks. But, know that it’s just a show-off. You will gradually build up the negative effects like sleeplessness, anxiety, headache, caffeine crashes, and slow progress with your activity or work.

To combat caffeine tolerance, it would be great if you manage your caffeine consumption. Pay close attention to the nutritional labels of your beverages, and stick to the FDA-recommended caffeine limit. In this process, you’ll manage the effects of caffeine in your body.

Primary Sources of Caffeine

To give you a glimpse of the beverages and its caffeine content, check the table below:

DrinksAmount of Caffeine
Brewed Coffee
8 fl.oz)
100 to 200mg
Instant Coffee
(8 fl.oz)
30mg to 150mg
(1 fl.oz)
30 to 50mg
Decaffeinated Coffee
(8 fl.oz)
5 to 10mg
Caffeinated Soda 
(12 fl.oz)
Black Tea
(8 fl.oz)
40 to 70mg
Brewed Tea
(8 fl.oz)
Chocolate Candy Bar 
(1.55 fl.oz)
16 fl.oz AMP Energy Drink
(16 fl.oz)
Bang Energy Drink
(16 fl.oz)
Red Bull
(8.4 fl.oz)
(12 fl.oz)
(16 fl.oz)
(16 fl.oz)
Rip It
(16 fl.oz)
Common drinks and its caffeine content

What Can You Get From Drinking Caffeinated Drinks?

Caffeine can provide both positive and negative effects on your body. What you’ll experience depends on your consumption. Take a look of the advantages and disadvantages of caffeine consumption:


You will get a lot of  benefits with proper consumption of caffeine, such as:

Improvement in Sports Performance

If you often play sports, caffeine may be a good companion to up your performance. Caffeinated drinks provide a boost that can help you manage your body and develop physical endurance. It helps you perform well and give your best shots.

If you’re interested in finding the best energy drinks for your workouts, check out this article here.

Alertness and Concentration

Caffeine increases your alertness and concentration by blocking your adenosine receptors from entering your brain. Know that once the adenosine receptors enter your brain, you will feel tired and want to rest. The role of adenosine is to tell your body to take breaks, which is why your body will feel tired when adenosine enters your brain.

With caffeine, you will feel sudden burst of energy that helps you manage your body.

Brain and Cognitive Functions

Caffeine can improve your thinking process and short-term memory. It helps you strategize effectively and handle your activities in your own way. It also plays an important role in slowing down your mental decline brought by age.


While there are numerous benefits from caffeine, consuming excessive caffeine can lead to adverse side effects:

Sleeplessness or Insomnia

Excessive consumption of caffeine can lead to insomnia or sleeplessness. Know that the half-life of caffeine in your body is five hours. Drinking too much can slows down your caffeine metabolism, which prevents you from getting a good night’s sleep.


Drinking too much caffeine can trigger your mood, which leads to an anxiety attack and depression. The more caffeine you consume, the more susceptible you’ll be to having depression and anxiety.

Caffeine Dependency and Addiction

You need to watch out for your caffeine intake, as it might cause you to form an addiction and dependency on caffeine. When your body becomes fully dependent on caffeine, you’ll not be able to function well without drinking caffeinated drinks.

It’s not limited to that because you might suddenly feel a build-up that continuously increases your caffeine consumption. It’s not good because it can lead to dizziness, jitters and shakes, dehydration, and even irritability in your surroundings.

It’s essential to regulate your caffeine consumption to minimize potential health problems. Check this video out to know more about the effects of caffeine in your body.

How to Get Caffeine To Wear Off?

Building up caffeine can be problematic because of its adverse effects. Don’t fret because there are ways for you to help your body release the caffeine that you consume. Here are the things that you can do:

Know When to Stop

The first thing that you need to bear in mind is when to stop your caffeine consumption. For example, if you notice that you’re starting to feel a bit light-headed or an increase in hear-rate, it’s best to put down that energy drink even if you haven’t finished it yet.

Considering that everyone’s caffeine tolerance is difference, only you can pick out what’s a suitable or excessive amount of caffeine for you, so while the daily 400mg limit set by the FDA is a good start, you’re going to have to figure out how much you can have on your own, and that means not diving off the caffeinated deep-end and only start with small sips at first.

Hydrate Yourself

Know that caffeine is a diuretic by nature, so you’ll have to keep yourself hydrated in order to minimize its effects. Increasing your water intake can help in the removal of caffeine faster through excretion, flushing it out of your body quicker.

I would recommend keeping the caffeinated beverage to water ratio at a decent 1:1 rate, so for every energy drink you have, you should try and have the same amount of water if you’re trying to shake off accidental jitters as quickly as possible.


Considering caffeine is known to improve exercise performance, if you start getting jittery, it might be best to go for a quick run to metabolixe the caffeine at a faster rate. Plus, you get to burn some calories in the process, making it a definite win-win situation.

REIZE (10 out of 10)

A glass of REIZE energy drink.
REIZE Energy, your partner without any crashes

If you’re looking for an energy drink that gives you a boost without harming your health, REIZE would be your perfect choice!

This powdered energy drink comes with a sensible 50mg of caffeine, 11 calories, and it’s completely sugar-free. On top of that, it’s a drink that’s packed with essential vitamins like taurine, ginseng extract, and essential B-vitamins.

REIZE is also convenient because you can have it wherever and whenever you like. All you need to do is pour the powder into your water or chosen beverage and mix it well. It’s sure to be a refreshing thirst quencher that satisfies your tastebuds.

Best of all, you can enjoy REIZE for only about $1 and have it shipped directly to your home. It’s hassle-free and totally amazing!

Give REIZE a try today and experience the goodness in every sip.

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