Caffeine has 13 effects on ordinary people. Adults can consume up to 400 milligrams of caffeine a day.

Professional baristas follow the coffee workshop (official Wechat account cafe_style) people usually drink coffee, tea and energy drinks to refresh themselves, essentially consuming a certain amount of caffeine. But what happens to the human brain and body when ingesting this colorless and tasteless ingredient? 1. Most healthy adults can consume up to 400 milligrams of caffeine a day.