Here's a video that explains the chemistry behind caffeine, which is the world's most popular drug. When ingested, caffeine breaks up into three different metabolites, each of which has a different effect on the brain. (Their magical influences achieve everything from increasing oxygen flow to accelerating fat breakdown, which enhances athletic performance.) But the explanation also comes with a downer for caffeine addicts: Scientists have determined that 400mg — or roughly three eight-ounce cups of coffee — is the safest daily intake for adults. Go, watch:
Video: The Science of Caffeine
· The Science of Caffeine [YouTube]
· All Coffee Coverage on Eater [-E-]