Caffeine is a naturally-occurring substance found in the leaves, seeds, and/or fruit of more than 60 plants, including coffee, cocoa beans, kola nuts, tea leaves, and guarana seeds

. It is also added to beverages and supplements

. Caffeine is known for its stimulating effects and is classified as Generally Recognized as Safe (GRAS) by the U.S. Food and Drug Administration (FDA)

. Some common sources of caffeine include:

• Coffee
• Cocoa beans and chocolate
• Kola nut
• Green tea
• Guarana
• Yerba mate drink
• Energy drinks

Caffeine can also be found in medications, soda, and some food additives

. It is important for consumers to be aware of caffeine content in the products they consume, especially for those who are sensitive to its effects or taking certain medications

. To find out the caffeine content in food and beverage products, consumers can check the ingredients list on product labels, as the FDA requires caffeine to be listed there