Natural grain grown. Mild tasting. TwinLab Brewers Yeast has been recognized as a storehouse of 100% pure natural nutrients without added vitamins or minerals. It should not be confused with "brewers type yeast" or "brewers molasses grown yeast" for these yeasts are primary grown, whereas TwinLab Brewers yeast is grain grown and is 100% genuine brewers yeast of superb quality and freshness. One heaping tablespoon provides 50% protein with all the essential amino acids, vitamins, minerals, and trace elements.