People have many questions about the caffeine in coffee. Lets look at the answers. Caffeine is a naturally occurring compound found in more than 60 different leaves, seeds, and plants including the coffee bean, kola nut, cacao seed, and tea leaves. Preparation methods and variations in the plant source affect the caffeine levels of various products. The effects of caffeine on the body include heart and central nervous system stimulation and muscle relaxation.
Caffeine also acts as a diuretic and increases the secretion of gastric acid in the stomach.
Like other food additives, caffeine is regulated by the Food and Drug Administration under the Food Additive Amendment of the Federal Food, Drug, and Cosmetic Act. In the 1980s, several studies linked caffeine to certain health hazards, calling for continued research. As a result, caffeine is now the most extensively studied food ingredient in our food supply. However, the efficacy of its use for this reason is questionable. Individuals vary in their response to caffeine, based on gender and body composition.