How long does coffee keep you energized?

In this article, we’ll discuss how long a cup of coffee keeps you energized. In addition, we will discuss the effects of caffeine on your body, which coffee roast has the most caffeine, and whether energy drinks have more caffeine than coffee.

How long does coffee keep you energized?

Drinking a cup of coffee keeps you energized for 6-8 hours. After 3 hours after consumption of coffee, the energy effect of caffeine begins to decrease. You may start to notice a change because the caffeine in coffee doesn’t make you more energetic, it just makes you less able to feel tired.

If you’re in need of a boost to finish work or stay awake for a few more hours, the good news is that caffeine has an almost immediate effect on the body. 

According to the American Academy of Sleep Medicine, the substance reaches its peak in the blood between 30 and 60 minutes after ingestion. 

There is even a study that points out that the state of alert can appear in just 10 minutes.

Normally, the body takes 3 to 5 hours to eliminate half of the substance and it takes between 8 and 14 hours for the body to be completely free of caffeine. 

Sleep experts recommend abstaining from coffee for at least eight hours before bed to avoid discomfort during sleep. Of course, the effects can vary and are usually more noticeable in people who don’t drink caffeine regularly.

What is the best time to have coffee?

At certain times, such as in the morning, it is not recommended to drink coffee. That’s because caffeine acts on the body’s natural energy generation – which can lead to a greater tolerance to this stimulant.

The secretion of cortisol, one of the hormones that controls the circadian cycle and makes us feel alert, is higher in the morning, to ensure adequate amounts of glucose and other energy substrates (fatty acids and amino acids) to all cells that “have finished to wake up”. 

In general, your production peak would happen around 8:00 am and 9:00 am.

This means that that cup you have when you arrive at the office is unnecessary, as your body is already naturally energized by this time, making caffeine something superfluous.

In addition to decreasing the energy effects of coffee, cortisol also makes your body more tolerant of it. This makes you need more and more cups of coffee for you to feel its effects.

How long does caffeine stay in the body?

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. Remember that caffeine is also present in cola-based soft drinks, cocoa and various teas (black, mate, green etc).

Some people metabolize caffeine faster, others slower. If you drink lattes at 6pm and then sleep poorly, you may be a slow metabolizer. There are genetic tests that show this, but you can simply test it by stopping drinking coffee and seeing the difference from one day to the next.

Do energy drinks contain more caffeine than coffee?

As strange as this may sound, drinking energy drinks isn’t going to keep you more alert or more awake than a cup of coffee. 

Something led us to believe that those small cans contain large amounts of caffeine, but that’s not true.

The Mayo Clinic portal reports that a 250 mL can of Red Bull can contain between 76 and 80 mg of caffeine, while a good old cup of coffee (240 mL) can vary between 95 mg and 200 mg. 

The difference is that energy drinks contain some sugars (sucrose and glucose), as well as taurine and other substances that can stimulate the nervous system. But if you’re in doubt, one shot of coffee will probably have all you need.

Do dark coffees have less caffeine than light ones?

Amazingly, no! Just as we believed that energy drinks would be able to do more for our performance than coffee, something led us to believe that darker coffees would have more caffeine than light ones. 

However, while dark-roasted coffees are strong, full-bodied, and tastier, that doesn’t mean they’re richer in caffeine than light-roasted coffees.

This is because the roasting process burns off some of the caffeine, making dark coffees the best option for those who want to enjoy the drink without feeling the effects of caffeine so intensely.


In this article, we discussed how long a cup of coffee keeps you energized. In addition, we discussed the effects of caffeine on your body, which coffee roast has the most caffeine, and whether energy drinks have more caffeine than coffee.


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.