How long does the effect of coffee last? Explore the secret of how it lasts

introduction

Coffee is an indispensable drink in many people's daily life. It can refresh the mind and increase attention and concentration. However, we may find that the effect of coffee does not last long. So, how long can the effect of coffee last? This article will explore the mysterious way to maintain the effect.

Background: Caffeine

To understand why coffee's effects last, you first need to understand its most important ingredient: caffeine. Caffeine is a natural stimulant that excites the central nervous system, suppresses fatigue, and increases alertness.

Phase 1: Rapid absorption and rapid high

When we drink a cup of freshly brewed hot coffee, most of the caffeine in it is absorbed from the intestines into the bloodstream within 30 minutes. This process is very rapid, and the highest concentration is reached after about 45 minutes.

Phase 2: The effect gradually weakens

The half-life of caffeine refers to the time it takes for the caffeine concentration in the body to drop to half. For most people, the half-life of caffeine is about 3-5 hours. During this stage, we will feel the effects of refreshing the brain, increasing attention and concentration.

Phase 3: Excretion of remaining caffeine

After a certain period of time, the remaining caffeine begins to be metabolized by the liver and excreted through urine. Normally, it takes about 6-10 hours to completely eliminate all the caffeine you have consumed.

Individual differences and other influencing factors

It’s important to note that everyone reacts differently to the ingredients in coffee and other factors. For example, some people may metabolize it faster than others, and may be at greater risk of adverse reactions if the body accumulates larger amounts or higher concentrations than average.

in conclusion

In summary, under normal circumstances, the effect of caffeine lasts for about 3-5 hours after drinking a cup of freshly brewed coffee. However, this time is not absolute, and individual differences and other influencing factors may cause the duration to vary. In order to maintain alertness and attention, you can supplement with coffee or choose other refreshing drinks in moderation when you need to concentrate for a long time.

References

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2. Mitchell DC et al. (2014). Beverage caffeine intakes in the US: Current estimates from the National Health and Nutrition Examination Survey (NHANES) Food Chem Toxicol;63:136–42.

3. Ruxton CHS et al. (2008). The impact of caffeine on mood, cognitive function performance, and hydration: a review of benefits and risks. Nutrition Bulletin;33:15–25.

4.Richardson NJ et al.(2017).Caffeine ingestion before an oral glucose tolerance test impairs blood glucose management in men with type 2 diabetes.J Nutr;147(10):1887–92.