Follistatin
Reviewed by Fat Man in the Arena · Updated March 2026
Key Takeaway
Follistatin is a glycoprotein that inhibits myostatin, the protein that limits muscle growth. By blocking myostatin, follistatin allows for enhanced muscle development.
How it works
Binds and neutralizes myostatin and activin, removing the natural brake on muscle growth and allowing greater muscle hypertrophy.
Benefits
- Myostatin inhibition
- Enhanced muscle growth potential
- Improved body composition
Side effects
- Very limited human data
- Theoretical concerns about uncontrolled tissue growth
Dosing protocol
Typical Dose
100 mcg daily
Frequency
Once daily
Highly experimental. Gene therapy approaches also being studied.
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Medical Disclaimer: This content is for informational and educational purposes only. It is not intended as medical advice or a substitute for professional medical consultation, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any peptide protocol.