← All peptides

Follistatin 344

Research Use Only
peptideSubcutaneous injection

Blocks myostatin -- the protein your body uses to cap how big your muscles can get. By blocking that brake signal, your muscles can grow past their natural genetic ceiling. A seriously powerful muscle-building peptide.

Dosing

100 mcg subq daily for 10-30 days. This is an advanced protocol.

Benefit Profile

💪 Muscle Growth
10/10
🔥 Fat Loss
5/10
🧬 Fertility & Hormones
3/10

Pricing

VendorVariantPrice
Amino Asylum
Reported federal raid in 2025
1mg$79.99BEST
Peptide Sciences
Announced voluntary shutdown
1mg$115.00

Published Research

20 studies indexed(1998–2025)1 meta-analysis1 clinical trial15 reviews

The effects of resistance training on myostatin and follistatin in adults: A systematic review and meta-analysis.

Khalafi M, Aria B, et al.·Physiol Behav·2023
Meta-Analysis

Circulating follistatin concentrations in adolescent PCOS: Divergent effects of randomized treatments.

Díaz M, de Zegher F, Ibáñez L·Front Endocrinol (Lausanne)·2023
Clinical Trial

The activin-follistatin system: Key regulator of kidney development, regeneration, inflammation, and fibrosis.

Nagayama I, Takei Y, et al.·Cytokine Growth Factor Rev·2025
Review

[Research progress of follistatin-related proteins in digestive system tumors].

Wu JN, Jiang YZ·Zhonghua Yu Fang Yi Xue Za Zhi·2024
Review

Follistatin and follistatin-like 3 in metabolic disorders.

Bielka W, Przezak A, Pawlik A·Prostaglandins Other Lipid Mediat·2023
Review

Maternal Serum Activin A, Inhibin A and Follistatin-Related Proteins across Preeclampsia: Insights into Their Role in Pathogenesis and Prediction.

Barrero JA, Villamil-Camargo LM, et al.·J Mother Child·2023
Review

The emerging role of follistatin under stresses and its implications in diseases.

Zhang L, Liu K, et al.·Gene·2018
Review

Circulating follistatin in relation to energy metabolism.

Hansen JS, Plomgaard P·Mol Cell Endocrinol·2016
Review

Clinical and Therapeutic Implications of Follistatin in Solid Tumours.

Shi L, Resaul J, et al.·Cancer Genomics Proteomics·2016
Review

The potential role of activin and follistatin in lung transplant dysfunction.

Snell JN, Westall GP, Snell GI·Expert Rev Respir Med·2015
Review
Showing 10 of 20 studies. Search PubMed for the complete list.

Stacks Well With