Caffeine

Caffeine is a natural stimulant commonly found in coffee, tea, chocolate, and some energy drinks. It works by blocking adenosine, a brain chemical that makes you feel tired, which leads to increased alertness and reduced fatigue. Caffeine can enhance focus and improve mood, but excessive consumption may lead to side effects such as insomnia, jitteriness, or increased heart rate. Sensitivity to caffeine varies among individuals, and its effects can depend on factors like age, metabolism, and habitual consumption. Moderation is key to enjoying its benefits while minimizing potential drawbacks.