Follistatin 344 (FST-344) is a synthetic research peptide commonly sold in 1mg vials. It acts as a myostatin inhibitor, meaning it binds to proteins that limit muscle development. It is studied for its potential to promote lean muscle mass, enhance tissue repair, and accelerate recovery.
Key Information and Considerations
- Research Use Only: Follistatin 344 is not approved for human consumption and is strictly designated for laboratory, biochemical, and regenerative research.
- Mechanism: It works by blocking myostatin and activins, molecular regulators that signal muscles to stop growing.
- Reconstitution: In research settings, the 1mg lyophilized powder is typically reconstituted using Bacteriostatic Water. Once mixed, it usually requires refrigeration and remains stable for a limited window (typically 7–10 days). [
- Safety & Ethics: Because it alters growth factors, long-term inhibition is heavily studied in relation to tumor suppression and cellular proliferation. Additionally, it is prohibited in competitive sports and is on the World Anti-Doping Agency (WADA) banned list.




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