For more energy and concentration Caffeine is a natural alkaloid found in the leaves, seeds, and fruits of over 63 plant species. It is known from beverages such as coffee, tea and energy drinks. Caffeine works by binding to certain receptors in the brain, which affects the natural flow of energy processes in the body. It is appreciated by many people in various everyday situations to support alertness and the feeling of freshness. The individual effect of caffeine can vary depending on needs and dosage.