Caffeine is a widely used stimulant that is classified as a nootropic due its effect on the brain. It is mainly found in coffee beans, and has been used as an ingredient in sodas, teas, chocolates, and energy drinks. Studies have shown that caffeine use has both mental and physical advantages. Positive effects on the brain include alertness and focus. It acts on the brain by blocking Adenosine receptors in the, which prevents sedation and relaxation from taking effect. The result is wakefulness and alertness. It also has been shown to act on Dopamine, Serotonin, and Adrenaline receptors in the brain.
In addition to its stimulant effect, caffeine has been used to provide energy and stimulate the nervous systems. It also can be used to promote strength and endurance during workouts. Each capsule contain 100 mg, and the recommended dosage is 1 capsule. If one dose is not enough, two capsules can be taken. Although caffeine can also be found in powder form, these capsules are pre-measured for safe and accurate consumption, making proper dosage easy.