Educational Wellness Information Only
This platform provides peer-reviewed research summaries and educational content about peptides for wellness and optimization purposes. Nothing on this site is intended as medical advice, diagnosis, or treatment. We do not claim any peptide can diagnose, treat, cure, or prevent any disease. Always consult a licensed healthcare provider before beginning any wellness protocol.
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Follistatin 344 vs Mecasermin (Increlex)
An educational, source-based comparison of Follistatin 344 and Mecasermin (Increlex) — how each peptide works, what it's researched for, and what to know before going deeper.
Myostatin-binding protein fragment researched for muscle growth.
A naturally occurring glycoprotein that binds and neutralizes myostatin and activin, releasing the natural brake on skeletal muscle growth in preclinical models.
- Muscular dystrophy models
- Skeletal muscle hypertrophy
- Age-related sarcopenia (preclinical)
- • Off-target effects on activin signaling (reproductive, cardiac) are a concern.
- • Not FDA-approved; banned by WADA.
Recombinant human insulin-like growth factor-1 (rhIGF-1) that binds IGF-1 receptors to promote linear growth in children with severe primary IGF-1 deficiency or GH gene deletion with anti-GH antibodies.
- Severe primary IGF-1 deficiency
- Growth failure with GH gene deletion and neutralizing GH antibodies
- • FDA-approved.
- • Hypoglycemia — must be taken with food.
- • Tonsillar hypertrophy, intracranial hypertension reported.
Follistatin 344 vs Mecasermin (Increlex) — Key differences
- Class: Follistatin 344 is classified as Muscle · Myostatin Inhibition, while Mecasermin (Increlex) is IGF-1 · Endocrine.
- Primary research focus: Follistatin 344 — muscular dystrophy models; Mecasermin (Increlex) — severe primary igf-1 deficiency.
- Tag: Muscle vs FDA-Approved · Endocrine.