Vira-Bac-YST is a vegan 100% food supplemnet that is intended to support a health immune and digestive system. It contains herbs such as Wild Oregano (which is not the same, and should not be confused, with the spice called oregano). Vira-Bac-YST: Enchances immune health, Contains fiber, and is a Chlorphy11 source. Vira-Bac-YST naturally contains carbohydrates, lipids, proteins (including essential amino acids), as found in Buckwheat Leaf and Juice, Olive Leaf Concentrate, and Wild Oregano--all the nutrients shown above are contained in these foods. Unlike many so-called “natural” formulas, Vira-Bac-YST is only comprised of foods and contains no synthetic USP nutrients or isolated mineral salts, but only contains foods and food concentrates.