How long does coffee stay in your system?

In this article, we will answer the question:”How long does coffee stay in your system?”. In addition, we will talk about how long the energy provided by coffee lasts after consumption and the health benefits and side effects of caffeine consumption.

How long does coffee stay in your system?

The coffee stays in your system from 3 to 6 hours. Caffeine is the main compound in coffee responsible for the stimulating effect of coffee. The substance is quickly absorbed by the body and begins to appear in the bloodstream in about 15 minutes. 

However, its peak of action occurs between 30 and 60 minutes after consumption, depending on each person’s metabolism and the form in which it was ingested (capsule, liquid, etc.). The substance remains in the body for three to six hours, until it is metabolized by the liver and excreted in the urine.

Caffeine has an average half-life of eight hours, which means 200 milligrams at 7:00 am becomes 100 milligrams at 3:00 pm and 50 mg at 11:00 pm. Hare that caffeine is also present in cola-based soft drinks, cocoa and various teas (black, mate, green etc).

How long does it take coffee to kick in?

The coffee will kick in within 20 minutes! A cup of coffee may take just 20 minutes to reach the bloodstream and about 1 hour to reach full effectiveness. However, this can vary for people who are already used to drinking coffee!

Many people wake up in the morning and quickly seek the first dose of coffee to be able to wake up for good. This effect is due to caffeine, a phytochemical with a stimulant action capable of increasing alertness and concentration.  The effects of the substance can help those who exercise to have more gas in training. 

How does caffeine act in the body?

Caffeine acts in the body with a direct effect on the central nervous system, making us more alert. In moderate doses, the substance can bring a number of benefits to the body, including improving memory and concentration, in addition to helping mental health as a whole. 

Coffee – which, due to its large consumption, ends up being one of the main sources of caffeine – has already been associated with a decrease in the risk of Alzheimer’s and some types of cancer.

On the other hand, excessive amounts of caffeine can increase heart rate, cause insomnia, anxiety and other side effects. Among those who consume the substance regularly, lack of the stimulant can result in headaches and irritability.

Once in the body, caffeine quickly starts triggering reactions: within 45 minutes it is absorbed, processed and free to circulate in the bloodstream.

The peak of the effects of caffeine occurs within 5 hours of ingestion, and it may take up to 40 hours to be completely eliminated from the body. 

In addition to genetics, factors such as age, weight, health condition, mood status also influence how the body reacts to the presence of the substance.

What are the reasons to like coffee?

The main reasons for liking coffee are its bitter taste, caffeine addiction and eating habits. In addition, coffee is widely used socially, between conversations and discussion circles.

Coffee has numerous science-proven human health benefits and it is worth getting into the habit of drinking at least 1 cup of coffee a day..

Below we list the main benefits of coffee for human health as well as why you should start consuming at least 1 cup a day.

  1. Coffee can prevent diseases such as Alzheimer’s
  2. Coffee provides more energy
  3. Coffee increases the ability to concentrate
  4. Coffee can help with weight loss diets

What is the caffeine crash effect?

The caffeine crash effect, after a few hours, makes you feel much more tired, with irritability, difficulty concentrating and short naps.

This is because when we get tired, there is an increase in the presence of adenosine (a substance that induces sleep) in the brain. Caffeine blocks the binding of adenosine in your brain, causing this substance to build up. Because of this, while keeping us energized, caffeine causes this adverse effect.


In this article, we answered the question:”How long does coffee stay in your system?”. In addition, we talked about how long the energy provided by coffee lasts after consumption and the health benefits and side effects of caffeine consumption.


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.