Phd nutrition whey isolate contains one major source of whey protein isolate whey protein isolate is one of the purest form availabler the phd nutrition whey isolate formally pharma pure has been formulated to provide you with a great tasting low fat protein shake perfect for those wishing to build lean muscle mass whilst on a calorie controlled diet r protein is the key building block in muscle growth and the phd nutrition whey isolate shake provides premium quality whey isolate