The fruit that is a natural source of caffeine and is commonly used in energy drinks and supplements is the Guarana fruit. Guarana is a climbing plant native to the Amazon rainforest in Brazil. Its fruit contains seeds that are known to have a high caffeine content. Guarana seeds can contain up to four times the amount of caffeine found in coffee beans.
Extracts from guarana seeds are often used in the production of energy drinks, dietary supplements, and various other beverages. The caffeine in guarana is released more slowly in the body compared to coffee, providing a prolonged energizing effect. It is often marketed for its stimulant properties, claiming to enhance focus, increase alertness, and boost physical and mental performance. However, it is important to consume caffeine-containing products in moderation and be aware of any potential side effects.