The chemical formula for caffeine is C8H10N4O2. Caffeine is a central nervous system stimulant commonly found in coffee, tea, chocolate, and various energy drinks. Its structure consists of eight carbon atoms, ten hydrogen atoms, four nitrogen atoms, and two oxygen atoms. Caffeine works by blocking adenosine receptors in the brain, which helps to promote wakefulness and alertness. Due to its stimulating effects, caffeine is widely consumed, and studies have explored its potential benefits and drawbacks, including its impact on concentration, mood, and sleep patterns.