SO HD™, a whey isolate protein powder, is whey protein in its purest form. This form of protein digests rapidly, making it the perfect way to quickly fuel your muscles after a workout — one of the most critical times for taking in muscle building nutrients. ISO HD aids in muscle health, recovery and growth. ISO HD is the purest, low calorie protein delivering 25 grams per serving of ultra premium, quickly digesting, 100% whey isolate and hydrolysate. Consumption of whey hydrolysate allows amino acids to be promptly absorbed, thereby maximizing the nutrients being delivered to your muscles. This unique formula is unmatched in not only nutritional value, but taste!