Follistatin-344

Preclinical

Follistatin-344 (FST-344)

Category
Growth Hormone
Aliases
FST-344, FS-344
Administration
Subcutaneous injection (preclinical/research use)

Research and regulatory

Development stage

Preclinical and limited early-stage research only; no completed human clinical trials for muscle-growth use as of 2026.

Legal and regulatory

Unregulated research compound; not FDA approved for human use.

Side effects

Not well characterized in humans