REDUCED BITTERNESS: After fermentation, the yeast is separated from the beer, roller dried and debittered. SUPER FOOD: Brewer’s yeast has naturally occurring protein and several B-vitamins. GENUINE WHOLE FOOD SUPPLEMENT: Produced by cultivation of Saccharomyces cerevisiae in the production of beer. GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation). Packaged in the USA by a family owned and operated company since 1968.