just because it claims to promote anabolism doesn't make it illegal. All 'anabolic' means is 'muscle building/promoting'. catabolic means muscle wasting.
products that directly increase testosterone...those are called Androgenic Anabolic Steroids...and yeah, in the US they are a controlled substance.
Muscletech stuff is indeed over priced, over hyped, and very very far from a miracle pill in bottle.
So your suspicions that its not all that its cracked up to be were correct.