Ingredients & DescriptionChromium is involved in glucose metabolism and is the major mineral needed for insulin production.* Chromium works with insulin support healthy blood glucose regulation. Chromium GTF (Glucose Tolerance Factor*) is a very easily absorbed form of chromium, naturally derived from yeast in the safe trivalent form. GTF chromium is naturally bound to glycine, glutamic acid, cysteine and niacin. In contrast, industrial chromium (as used on autos) is in a hexavalent form and is toxic.