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Put two entries side by side — evidence, mechanism, risks, and community claims.
GDF-8 (Myostatin)
Preclinical
Research chemical
Summary
Endogenous negative regulator of skeletal muscle growth; catalog material is typically for assay/research reference rather than use as a drug.
Categories
Performance
Mechanism
Binds ActRIIB (and related receptors) to activate SMAD2/3 signaling that suppresses muscle protein synthesis and satellite-cell activity.
Half-life
Circulating latent complex; active form regulated by proteolysis
Routes
Subcutaneous injection
Legal / access
Research reagent. Not a therapeutic product for injection.
Key risks
- Would theoretically reduce muscle if bioactive and delivered systemically
Common claims
- Mostly relevant as the target to inhibit
- Educational reference for myostatin pathway
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