Our Organic Nutritional Yeast Flakes are produced with a specially selected strain of Saccharomyces cerevisiae. It is grown on an organic cane molasses substrate. It is an inactive food grade nutritional yeast that is high in B vitamins and dietary fiber, and made up of over 1/3 protein. Available in .9 oz, 1.5 oz, and 5 oz shaker top bottles. Allergen:Contains wheat.