Surprisingly, men are more sensitive than women to the effects of coffee, the study also found.
The stimulating effects of coffee take just 10 minutes to kick in.
However, it takes around 30-45 minutes to reach the maximum level in the body.
Its effects usually last between 2-3 hours and sometimes 4-5 hours depending on an individual’s metabolism.
Surprisingly, men are more sensitive than women to the effects of coffee, the study also found.
Dr Ana Adan, the study’s first author, said:
“Although both the men and women saw an improvement in their activity levels with the coffee, which increased in later measurements, we observed a greater impact among the males.”
The study involved giving varying levels of caffeine to 668 young people and measuring its subsequent effects.
Related
The study was published in the Progress in Neuro-Psychopharmacology and Biological Psychiatry (Adan et al., 2008).
