Follistatin 344
Also known as: FS-344 · Follistatin-344
A recombinant form of the naturally occurring follistatin protein, discussed mainly in the context of muscle growth because of its ability to bind and neutralize myostatin.
Class
Myostatin-binding protein
Default unit
mcg
Common route
Subcutaneous or IM
Typical half-life
Not well established
Frequency
Varies by use
Commonly associated areas
Illustrative map of the body systems Follistatin 344 is most often discussed in relation to. Relative emphasis only — not a measure of efficacy or a medical claim.
Proposed mechanisms / pathways
What is Follistatin 344?
Follistatin 344 is a recombinant version of follistatin, a protein the body produces naturally that binds and regulates members of the TGF-β superfamily. The "344" refers to a specific 344-amino-acid isoform. It is most often discussed because follistatin can bind and neutralize myostatin (GDF-8), the signaling protein that normally acts as a brake on muscle growth. For that reason it tends to be grouped with muscle-and-performance compounds rather than with the GH-axis or repair peptides.
How it is thought to work
Myostatin limits how much muscle tissue can accumulate by signaling through activin receptors and the SMAD pathway. Follistatin is reported to act as a decoy that sequesters myostatin and related ligands such as activin, which is thought to reduce that inhibitory signal and shift the balance toward muscle growth. Most of this understanding comes from animal and laboratory work, and how it translates to real-world outcomes in people is not well characterized.
Educational only — not medical advice
Follistatin 344 is a research protein and is not an approved medication for general human use. Nothing here is a recommendation, dose, or medical claim. Consult a qualified healthcare provider and follow the laws in your area.
Tracking Follistatin 344 in LynkDose
Because Follistatin 344 has no established human dosing schedule and is tracked in micrograms, careful logging matters. Record each administration with its date, amount, and site, then let LynkDose chart the pattern alongside strength, training performance, weight, and recovery data. The value of a tracker here is seeing the multi-week trend rather than reacting to any single session.
Commonly discussed for
- Muscle growth and hypertrophy interest
- Myostatin-inhibition research
- Body-composition and performance goals
Often stacked: Sometimes discussed alongside other muscle-focused compounds such as IGF-1 LR3 or GH-axis peptides, though it is more often talked about on its own as a myostatin-targeting agent.
How to track Follistatin 344 in LynkDose
Follistatin 344 is a research protein with no established human dosing schedule, so log each administration with its date, amount in micrograms, and site. Watch strength, body-composition, and recovery trends over weeks rather than expecting any single-day signal.
Deeper read: How to Track a Peptide Cycle: A Complete Guide
Not medical advice
This page is educational and does not recommend, prescribe, or dose any compound. Many peptides are research chemicals not approved for general human use. Always consult a qualified healthcare provider and follow the laws in your area.