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Why caffeine gives us a boost of energy – healing practice



Why caffeine gives us energy

For many people, the first lesson after getting up leads to the coffee machine. Also in the afternoon sells caffeine reliably the midday trough. But where does the energizing effect of Coffee, tea, Cola and energy drinks? A metabolism expert provides answers.

Doctor Sai Krupa Das is a metabolism expert at the famed Tufts University in Massachusetts (USA). In a recent article from the institution, the scientist explains why caffeine acts as an energy booster for most people.

Caffeinated beverages are hugely popular

85 percent of all people in the United States consume At least one caffeinated drink per day. It should look like this in Germany. Because coffee and cola are among the most popular drinks here, along with mineral water and fruit juices.

Caffeine blocks receptors in the brain

As Doctor Sai Krupa Das explains, caffeine blocks certain receptors in the brain. These receptors affect important brain functions affecting sleep, wakefulness, cognition, memory and learning.

When the receptors are functioning normally, brain activity gradually slows, causing a Feeling tired or dizziness occurs. By blocking these receptors, it becomes nascent prevents fatigue.

According to Dr. Sai Krupa The particular receptors are in the basal ganglia blocked. It is a group of cerebral and diencephalic nuclei associated with, for example, emotions, cognition and various types of learning.

Some people experience a different effect

Most people perceive the effects as uplifting. However, in some people, caffeine intake may also increase increased nervousness or even to anxiety carry out.

Caffeine metabolism

If coffee or another caffeinated beverage is consumed, the caffeine it contains enters the bloodstream via the gastrointestinal tract and from there into the brain.

The concentration of caffeine in the blood varies from person to person 15 minutes to two hours peak after consumption. At its peak, the effects are most noticeable in the form of an energy boost.

Caffeine metabolism also varies from person to person. Some people break down half the caffeine in their blood in two hours, while others need 12 hours for the process.

This is also the reason why some people can still drink coffee in the evening and continue to sleep, while others are kept up late at night by caffeine. (vb)

Author and source information

This text corresponds to the specifications of the specialized medical literature, medical guidelines and current studies and has been verified by health professionals.


Graduate editor (FH) Volker Blasek


  • Tufts University: How does caffeine give us energy? (published: 08/09/2022),

Important note:
This article contains general advice only and should not be used for self-diagnosis or treatment. It cannot substitute a visit to the doctor.

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