From Black And Green Tea

Caffeine is a natural stimulant found in the leaves and seeds of plants, including coffee beans, tea leaves, and cacao beans. It is extracted from these sources, often through processes involving hot water or solvents, to isolate the compound. The resulting caffeine is typically a white, crystalline powder.

Manufacturers add caffeine primarily as a stimulant to enhance alertness and reduce fatigue. It is most commonly found in beverages such as coffee, tea, energy drinks, and some soft drinks. It can also be used in small amounts in some other food products.

The U.S. Food and Drug Administration (FDA) recognizes caffeine as generally safe (GRAS) when used as intended. At typical consumption levels, caffeine can temporarily increase alertness and reduce drowsiness. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have evaluated caffeine. Evidence on the long-term health effects of caffeine consumption is mixed, with some studies suggesting potential benefits and others highlighting risks associated with excessive intake, such as anxiety or sleep disturbances.