The beer yeast is taken during the production of beer from malt, barley & wheat. That is, it is a 100% natural source of vitamins of the B complex containing amino acids, minerals & trace elements that make it useful as a tonic that gives immediate energy to the body at all ages. Health Aid Brewers Yeast is recommended for healthy nervous & digestive system and for treating acne because it has healing properties. Also because of its high chromium content it helps to regulate blood sugar levels. Brewer's yeast can reduce appetite and helps to ingest fewer calories when taken before eating, giving you a feeling of satiety.