Gummies for hair and skin usually contain all the essential vitamins and minerals which promote the growth of hair and skin health. The key ingredient of gummies is biotin which helps in the production of keratin. Keratin is the protein that provides structure to the hair. Gummies are dietary supplements that complement the diet without investing too much time to take care of skin and hair. However, a person needs to be patient while taking the gummies as it takes time to show the benefits.