The combination of brewer's yeast and selenium results in the correct balance of our hair and nails. Selenium is an antioxidant that prevents cellular aging, boosts the immune system, and prevents heart disease. Brewer's yeast is found in barley, it consists of plant-based proteins and vitamins. They provide proteins, minerals, and vitamins necessary for the good health of our hair. Specifically, proteins strengthen skin, hair, and nails. Hair: Brewer's yeast contains water-soluble vitamins: B1, B2, B6, niacin, and biotin, all responsible for the good health of the hair. Avoiding dull hair. Nails: It helps strengthen them, avoiding brittle nails.