Optimum Nutrition Gold Standard 100% Whey24 Grams of Protein per Serving to promote muscle strength and repair Whey Protein Isolate (WPI) main ingredient 5. 5 Grams of Naturally Occurring BCAAs per Serving to Support Endurance and Recovery UNCOMPROMISING QUALITY. FOR THOSE WHO TRAIN WITHOUT COMPROMISE. Each serving of the worlds best selling whey protein powder provides 24 grams of high quality whey protein primarily from Whey Protein Isolate, which has had excess carbohydrates, fat, and