What is Follistatin?
The short answer
Follistatin is a protein.
What it is
Follistatin: Myostatin-binding protein.
What people look into
Muscle and exercise
- 4 sources
- Status as of
- How we source
- Ellum doesn't sell peptides.
Get updates on Follistatin
What it is
- Also known as
- follistatin 344, fs-344
Regulatory status
Not FDA-approved How we label status
As of October 4, 2026, Follistatin is not FDA-approved for any use and is not on FDA's 503A bulks list.
- Federal (FDA)
- Not FDA-approved
- 503A compounding
- No category; not on 216.23 as of 2026-10-07; not an approved-drug component (as of October 7, 2026)
- WADA 2026
- S4.3
References
Sources as of October 4, 2026