Follistatin 344

How It Works

Follistatin 344 binds to and neutralizes myostatin and activin — two key proteins that limit muscle growth. By removing these "brakes" on muscle development, it allows for enhanced hypertrophy and strength gains. It also plays roles in reproductive biology, liver homeostasis, and inflammation modulation. The 344 variant is the full-length isoform with the broadest tissue distribution.

Key Research Findings

• Myostatin knockout models show dramatic increases in muscle mass (2–3x normal)
• Gene therapy with follistatin increased muscle mass and strength in primate studies
• May reduce fibrosis and improve muscle quality in addition to increasing size
• Research suggests potential benefits for age-related muscle wasting (sarcopenia)

Common Research Protocols

Use our free dosing calculator to determine exact syringe units after reconstitution.

Reconstitution Guide

Follow these steps to properly reconstitute Follistatin 344 for research use:

• Step 1: Swab the tops of both the peptide vial and bacteriostatic water vial with alcohol.
• Step 2: Draw your desired amount of BAC water (commonly 1–2 mL) into an insulin syringe.
• Step 3: Inject the water slowly into the peptide vial, aiming at the glass wall — not directly onto the powder.
• Step 4: Swirl the vial gently until fully dissolved — never shake.
• Step 5: Refrigerate at 36–46°F (2–8°C). Use within 4–6 weeks.

Use the dosing calculator to calculate your exact concentration (mcg per unit) and how many units to draw on your syringe.

Frequently Asked Questions

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