There really is no way to test the effects of supplements on muscle building. Thats the gimmick that "fake" companies use. For example, if i train for two months without supplements and put an inch on each arm, then train the left arm only with supplements and every other weekend than the right arm, than it will grow more right? But then this experiment has way too many extra factors that may or may not change the outcome. Factors like diet, sleep, mental prepareness, intensity, focus, other things like that. It is truly difficult to show supplements do work. You will see" Increased muscle protein content by 48%, bench press by 32 pounds in two months? But then you have to know what was the rate of progress without supplementation. And then even this is pointless because it is common knowledge that it becomes harder and harder to grow as the body adapts to stress over time.

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