Follistatin-344
Also known as: FST-344
A naturally occurring protein that inhibits myostatin and activin, effectively removing the biological ceiling on muscle growth.
What is Follistatin-344? A naturally occurring protein that inhibits myostatin and activin, effectively removing the biological ceiling on muscle growth.
How does Follistatin-344 work? Follistatin-344 is a 323-amino acid glycoprotein that acts as a natural myostatin inhibitor. By blocking myostatin, Follistatin-344 removes the genetic ceiling on muscle development.
Benefits of Follistatin-344: Removes myostatin-imposed ceiling on muscle growth; Dramatic increases in lean muscle mass; Increased bone density; Enhanced endurance; Anti-catabolic effects
Follistatin-344 dosage: Research cycles of 10-30 days. Very limited human data.
Research status: Research Only
Source: PeptideWiki — https://www.peptide-wiki.net/peptides/follistatin-344
Mechanism of Action
Follistatin-344 is a 323-amino acid glycoprotein that acts as a natural myostatin inhibitor. By blocking myostatin, Follistatin-344 removes the genetic ceiling on muscle development.
Benefits
- Removes myostatin-imposed ceiling on muscle growth
- Dramatic increases in lean muscle mass
- Increased bone density
- Enhanced endurance
- Anti-catabolic effects
Side Effects & Risks
- Potential joint weakness
- Injection site irritation
- Elevated body temperature
- Limited long-term human safety data
Where to Buy Follistatin-344
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$99.99
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Storage & Reconstitution Guide
Storage Temperature
-80°C lyophilized, -20°C short-term
24 months (lyophilized), 28 days (reconstituted)
Reconstitution Solvent
Sterile water; mix gently at room temp
Swirl gently — do not shake or vortex
Handling Notes
Protect lyophilized peptide from moisture and light. Once reconstituted, keep refrigerated. Discard if solution becomes cloudy or discolored. Use insulin syringe for precise dosing.
Step-by-Step Reconstitution
Gather supplies
BAC water, insulin syringe, alcohol swabs, vial
Disinfect tops
Swab rubber stoppers of both vials with alcohol
Draw BAC water
Pull desired mL of BAC water into syringe
Inject slowly
Inject BAC water down the side of the peptide vial, swirl gently to dissolve
Research Protocol
- Dose Range
- 50–100 mcg
- Frequency
- Once daily
- Cycle
- 10-30 days
- Routes
- subcutaneous injectionintramuscular injection
- Notes
- Research cycles of 10-30 days. Very limited human data.
Legal & Regulatory Status
Sold for research purposes only. Not for human use. Laws vary by country.
Commonly Stacked With
View all peptide stacks →External Resources
Chemical Properties
- CAS Number
- 80449-31-6
- Mol. Weight
- 37,800 Da
PeptideWiki Research Team
Evidence-based research data sourced from PubMed and ClinicalTrials.gov · Last updated: February 25, 2026
Frequently Asked Questions About Follistatin-344
What is Follistatin-344?▾
A naturally occurring protein that inhibits myostatin and activin, effectively removing the biological ceiling on muscle growth.
What are the benefits of Follistatin-344?▾
Removes myostatin-imposed ceiling on muscle growth
What are the benefits of Follistatin-344?▾
Dramatic increases in lean muscle mass
What are the side effects of Follistatin-344?▾
Potential joint weakness
What is the recommended dosage for Follistatin-344?▾
Research cycles of 10-30 days. Very limited human data.
How long should a Follistatin-344 cycle last?▾
10-30 days
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