About this item Active B6: The active form of vitamin B6 that is readily used by the body Multiple Functions: An essential cofactor for the synthesis of amino acids and numerous neurotransmitters (brain chemicals)* PMS: Pairs with magnesium for support of women with PMS* Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish. Thorne's commitment to integrity and science-backed products has helped us earn the trust of thousands of health-care professionals, U.S. National Teams, the Mayo Clinic, and families around the world.