Natural Factors Glycine is an athletic support supplement that assists in building lean muscle mass when combined with regular resistance training and a healthy, balanced diet. It provides a source of an amino acid involved biochemically in muscle protein synthesis and helps support healthy blood sugar levels. Each scoop of the neutral-tasting, vegan powder contains 5 g of glycine made through natural fermentation. This formula contains no fillers, is non-GMO, and offers flexible dosing of 1–3 scoops per day.