Human clinical studies have shown that Tonalin CLA (Conjugated Linoleic Acid) plays a vital role in reducing body fat and enhancing lean muscle mass. Not only has CLA been shown to increase muscle mass while reducing body fat, studies have also shown remarkable anti-catabolic, antioxidant, and immune enhancement benefits. Several other studies have even revealed dramatic cholesterol reducing effects. All this from a structured lipid. A designer fat if you would. As always, for best results include a healthy diet and excercise program.