Follistatin-344
Follistatin-344 (FST-344)
Last updated: March 2026
Key Benefits
How It Works
Follistatin-344 is a recombinant form of human follistatin, a glycoprotein that binds and neutralizes myostatin — the protein that limits muscle growth. By inhibiting myostatin and activin signaling, follistatin removes the natural brake on muscle hypertrophy. It has been extensively studied in gene therapy trials for muscular dystrophy and muscle wasting conditions.
Research Highlights
Available Forms
- Lyophilized powder for injection
Research Dosing
Research protocols typically use 100mcg-1mg subcutaneous. Due to its large size and cost, careful dosing is important. Short cycling protocols are common.
⚠️ For research reference only. Not medical advice.
Legal Status
Follistatin-344 is available for research purposes. Not FDA-approved. It is on WADA's prohibited list for athletes. Not a controlled substance.
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