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Follistatin (specifically the FST-344 isoform) is a potent autocrine glycoprotein that plays a critical role in the regulation of muscle mass. It functions primarily as a high-affinity binding protein for Activin and Myostatin. By sequestering these proteins into inactive complexes, Follistatin allows for muscle growth beyond the body’s natural genetic limitations.
This 1 mg vial contains a high-purity recombinant version of the endogenous protein, designed for targeted tissue growth and rapid physical recovery.
Follistatin works through a complex signaling pathway to promote anabolism:
Myostatin Inhibition: It binds directly to Myostatin (GDF-8), a TGF-beta protein that restricts muscle growth. By blocking Myostatin, Follistatin allows for increased muscle fiber hypertrophy and hyperplasia.
Activin Sequestration: It neutralizes Activin, preventing aberrant cell overgrowth and regulating follicle-stimulating hormone (FSH).
Anti-Inflammatory Modulation: Research suggests Follistatin can downregulate systemic inflammation, making it a subject of study for conditions like asthma and colitis.
Rapid Muscle Mass Gains: By removing the "brakes" (Myostatin) on muscle development, it facilitates substantial increases in lean body mass.
Enhanced Strength: Supports explosive power and strength gains by increasing muscle fiber density.
Advanced Recovery: Drastically reduces the time required for muscle repair following high-intensity training sessions.
Synergy: Often used in cycles where athletes aim for extreme hypertrophy that cannot be achieved through traditional anabolic agents alone.
Administration: Typically administered via subcutaneous or intramuscular injection.
Dosage: Must be individually calculated. Common protocols in research settings often involve 100 mcg per day or a large single dose every few days during a short cycle (e.g., 10 days).
Potential Side Effects: May include temporary joint or tendon soreness (due to rapid muscle growth), cardiac hypertrophy (at extreme doses), and potential impacts on the reproductive axis (hypogonadism).
Unreconstituted: Keep refrigerated (2°C - 8°C) for long-term stability. Avoid exposure to direct light and heat.
Reconstituted: Use Bacteriostatic Water for mixing. Once dissolved, the peptide becomes highly fragile; must be kept refrigerated and used within a short window (typically 7–10 days) for maximum efficacy.
