Product Description Bio-Formed Glucose Tolerance FactorEach tablet supplies genuine certified active and biologically tested BioFormed GTF Chromium complexes containing 200 mcg of organic trivalent chromium. All the chromium in Twinlab Bio-Formed GTF Chromium is biologically formed and organically bound (chelated) in to live brewers yeast cells during the natural growth process of yeast. The chromium is assimilated by the yeast and thus formed in the same manner as the natural amounts of chromium which have always occurred naturally in brewers yeast. This product is 100% natural. No sugars, starch, flavors, colors or preservatives. No corn, soy, wheat, milk or egg derivatives. Packaged in a glass bottle for maximum stability, quality and freshness.