Caffeine is found in the leaves, seeds, or fruits of more than 60 plants. It's widely found in beverages and foods, such as coffee, tea, cola drinks, and chocolate.

Caffeine is one of the most thoroughly studied ingredients in the food supply. In 1958, the U.S. Food and Drug Administration designated caffeine in cola drinks as “Generally Regarded As Safe.” The FDA considers caffeine safe for all consumers including children.

Moderate caffeine consumption for adults, considered to be about 300 mg per day -- or the amount contained in 2-3 cups of coffee or 5-6 cans of caffeinated soft drinks -- has not been associated with adverse health effects. Although not defined, moderate caffeine consumption is expected to be lower for children. Pregnant or nursing women, or women trying to become pregnant, should consult a doctor regarding caffeine consumption.