Biotin is a water-soluble B complex vitamin, which is most commonly known as Vitamin H. It can influence the composition of keratin and promote the formation of intercellular lipid layers through increased lipid synthesis, which improves the skin´s natural barrier function. Biotin has an effect on fine and brittle hair by improving the quality of the keratin structures formed and it also provides a distinct reduction in fine wrinkles in the skin when applied topically.