Brewer’s yeast is made from a one-celled fungus called Saccharomyces cerevisiae and is used to make beer. It is also grown specifically to make nutritional supplements and has been used for years as such.
It is a rich source of minerals -- particularly chromium, an essential trace mineral that helps the body maintain normal blood sugar levels, selenium, protein, and the B-complex vitamins B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B9 (folic acid), and H or B7 (biotin). These help break down carbohydrates, fats, and proteins, which provide the body with energy. They also support the nervous system, help maintain the muscles used for digestion, and keep skin, hair, eyes, mouth, and liver healthy.
It tastes bitter and should not be confused with baker’s yeast, nutritional yeast, or torula yeast. All those types of yeast are low in chromium.Despite vegetarians’ belief to the contrary, brewer’s yeast does not contain vitamin B12, an essential vitamin found in meat and dairy products.