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.
- 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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