NOW Brewer’s Yeast has several naturally occurring vitamins and minerals with most notably B-vitamins. In addition brewer s yeast offers other components such as amino acids and beta-glucans. No synthetic vitamins are added to the yeast during processing. NOW Brewer’s Yeast is a genuine whole food supplement. Brewer’s yeast has naturally occurring B-vitamins such as: thiamin (vitamin B-1) riboflavin (vitamin B-2) niacin vitamin B-6 folic acid biotin and pantothenic acid.