How can some people refresh themselves by drinking coffee while others still feel sleepy? There are three factors that cause coffee to have different effects on people: age, genes and habits:
1. Age factor:
With age, there are fewer and fewer receptors in the brain that can dock with caffeine. The number of receptors in the brain of a 60-year-old is less than 1/3 of that of a 20-year-old-so coffee tends to have less effect on the elderly.
two。 Genetic factors:
Everyone has different receptors in the brain because of their genes. Some people's brains are better able to accept caffeine-coffee has a particularly significant effect on these people.
3. Habitual factors:
If you drink a lot of coffee over a long period of time, the brain will release fewer and fewer receptors-coffee will have less and less effect because of habit, which is similar to producing immunity.
