CLA may promote muscle protein synthesis by increasing testosterone levels and improving blood sugar regulation. Alex Ribeiro from Londrina State University in Brazil, and co-workers, found that supplementing 3.2 grams per day of CLA for eight weeks during an endurance-training program had no effect on endurance, leg or trunk fat, or total body fat beyond the effects of endurance exercise alone. The study found that CLA has effect on fat loss in obese women.