Kosher This is a primary grown nutritional yeast from pure strains of Saccharomyces cerevisiae grown on mixtures of cane and beet molasses. After the fermentation process is completed the yeast is harvested, thoroughly washed, pasteurized, and dried on roller drum dryers. The B vitamins are both naturally produced during fermentation, and added to the cream prior to the drying process. Riboflavin (B2) and Cyanocobalamin (B12) are created during fermentation. Additional Riboflavin (B2) and Cyanocobalamin (B12) are added after fermentation along with Thiamine (B1), Pyridoxine HCL (B6), Niacin and Folic Acid.