www.snac.ucal.edu (2005) presented that “Within 30-60 minutes of drinking a cup of coffee, caffeine reaches peak concentrations in the bloodstream. And, it typically takes 4-6 hours for its effects to wear off.” (p.1)
a stimulant which is legal and popular in most developed countries.
Caffeine gets people up on the morning and it keeps them moving throughout the day. But, how much caffeine are you consuming each day? And how much is too much?