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