Myostatin

The antibody that blocked it in men added muscle size and left their strength flat.

Also called GDF-8, Growth Differentiation Factor 8, MSTN

Who it's forAny lifter being sold follistatin, ACE-031 or a myostatin blocker in a bottle.

Emergency: call 911.

I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.