Follistatin 315 vs Follistatin-344
Comparison
Follistatin 315 and Follistatin-344 are two peptides people frequently compare. Researchers study Follistatin-315 for its role in muscle growth, liver regeneration, and bone repair by blocking the body's natural muscle-limiting signals. It's investigated as a potential therapy… Follistatin-344 is a peptide people use for muscle building, primarily because it inhibits myostatin — the body's natural brake on muscle growth. It's studied for muscle wasting diseases and has been…
| Follistatin 315 | Follistatin-344 | |
|---|---|---|
| What it is | Researchers study Follistatin-315 for its role in muscle growth, liver regeneration, and bone repair by blocking the body's natural muscle-limiting signals. It's investigated as a potential therapy… | Follistatin-344 is a peptide people use for muscle building, primarily because it inhibits myostatin — the body's natural brake on muscle growth. It's studied for muscle wasting diseases and has been… |
| Primary uses |
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| How it works | It's investigated as a potential therapy for muscle wasting diseases. No FDA-approved therapeutic use; prohibited by WADA; evidence comes primarily from animal models and lab studies. | It's studied for muscle wasting diseases and has been used off-label by athletes seeking physique enhancement. No FDA-approved use; prohibited by WADA; most evidence from animal models. |
| Common dose | 100 mcg, intramuscular, once daily | 100 mcg, intramuscular (IM) injection, once daily |
| FDA status | Not stated in reviewed literature — requires manual verification. No approved pharmaceutical formulations noted in reviewed literature. | Not stated in reviewed literature — requires manual verification. No approved pharmaceutical formulations of follistatin noted in reviewed literature. |
| Evidence level | Mixed | Human observational |
| Full Follistatin 315 page → | Full Follistatin-344 page → |