Caffeine is an alkaloid that is naturally found in coffee beans, cocoa and tea leaves. It has been used for medicinal purposes since ancient times, and today it can be found in various medicines, mainly analgesics, then in energy and other drinks, chocolates and desserts, as well as in cosmetic products. Caffeine is known for its stimulative and diuretic properties. It has a positive effect on the skin, hair and cellulite. It has the ability to improve microcirculation in the skin, thereby contributing to better skin and hair quality. If it is found in cosmetic products intended for eye area care, it improves blood flow in the skin and leads to a reduction in puffiness of the eye bags, as well as a reduction in dark circles around the eyes. It diminishes skin damages caused by UV rays. Caffeine has a stimulating effect on hair growth, and it can also help prevent hair loss. Caffeine acts on hair follicles so that the growth phase is extended and leads to stronger, denser, and healthier hair.