Supports Healthy Glucose Metabolism* NOW® GTF Chromium is a biologically active form of chromium known as chromium nicotinate glycinate.* This form is also known as œGlucose Tolerance Factor (GTF) because it is most similar to the form that was originally isolated from a food source. Natural color variation may occur in this product. TRAACS and the Albion Gold Medallion design are trademarks of Albion Laboratories, Inc.