215 In the index

Myostatin (GDF-8) GDF-8

A natural protein that acts as the body's built-in brake on muscle growth — the target of many muscle-building drugs currently in development, rather than something taken itself. People born with rare mutations that block this protein show dramatically more muscle, which is strong real-world proof of what blocking it can do.

Also known as Growth differentiation factor 8

Effects Build muscle

Routes Subcutaneous

Legal status Research chemical

WADA Banned at all times

Reported dosing

Limited data

What has been reported in the literature and by users. This is a record of what is done, not a recommendation.

Typical dose Not applicable as a supplement; myostatin itself limits muscle growth

Reported range Not applicable

Route n/a

Frequency n/a

Duration n/a

Myostatin is the natural protein that limits muscle growth; products are typically marketed as myostatin inhibitors (e.g., follistatin), not myostatin itself. Included here for clarity given it is sometimes searched as if it were a supplement.

Where this comes from Published research literature

Human data for this compound is limited. Read the figures above as a record of reported use rather than established dosing.