I did some research on this many months ago, and basically even if it lowered myostatin by raising follistatin, you would have to take the product for years to see a noticable difference. A study which was done by the same company who made it i believe said this product did infact lower myostatin, but either didn't cause muscle gain in the period it was used, or they didn't measure that.
In fact, the real heavy duty myostatin blockers haven't yet been proven effective at muscle gain in humans, even though there have been some clinical tests.
Also,
The other thing is that myostatin is needed for tendons, so if you inhibit that, you are much more prone to injury.
It won't give you any short term results.
It supposedly inhibits myostatin with follistatin, a natural myostatin blocker which is extracted from eggs in very large amounts.
If the product really does inhibit myostatin, which i don't doubt, and you had taken it since birth for 20 years, yes, you would be more muscular than normal. But for alot of money.