Caffeine is a natural alkaloid found in many plant species, such as guarana and coffee beans. When consumed, it stimulates our central nervous system, which can make us feel more alert and awake. When applied topically, it boasts many skin benefits.
Generally added in products from 0.5% to 3%, caffeine helps detoxify and soothe the skin, improving the appearance of fine lines and wrinkles.
As an antioxidant, it also combats the negative effects of the sun on the skin, helping reduce signs of photoaging.