Caffeine is a natural stimulant found in coffee, tea, and other sources. It stimulates the central nervous system, promoting alertness and reducing fatigue by blocking the action of adenosine. Caffeine can enhance physical performance, increase metabolism, and potentially offer some health benefits. Individual sensitivity varies, and dependence and withdrawal are possible with regular consumption. Moderate intake, around 400 mg per day for adults, is generally considered safe, but it’s essential to be mindful of personal tolerance and potential health concerns. Consultation with a healthcare professional is advisable for those with specific health conditions or concerns.