Follistatin-344
FS-344 · Follistatin splice variant 344
A naturally occurring glycoprotein that inhibits myostatin and activin, studied for its dramatic muscle growth and satellite cell activation properties.
Half-Life
~15-30 hours
MW
~35 kDa (glycosylated)
Amino Acids
N/A
Evidence
Low Evidence
Regulatory Status
Research use only. Gene therapy approaches being developed.
In Plain English
A powerful myostatin blocker — myostatin is the protein that caps how much muscle your body will allow. By neutralizing it, follistatin removes that ceiling. Animal studies show near-doubling of muscle mass.
Overview
Follistatin-344 is a splice variant of follistatin, a natural glycoprotein that binds and inhibits members of the TGF-β superfamily, most notably myostatin and activin. Myostatin normally limits muscle growth; its inhibition allows for dramatic muscle hypertrophy and satellite cell activation.
Common Formats
- Lyophilized protein (injectable)
Storage Notes
-80°C for long-term storage.
Looking for multi-compound protocols?
Browse educational protocol discussions that include Follistatin-344.
Research Sources
(2 vendors)For research use only. No affiliation or endorsement implied.
Related Compounds
IGF-1 LR3
A potent long-acting variant of IGF-1 with a 13-amino acid extension and substitution that dramatically extends its half-life and prevents protein binding.
PEG-MGF
A pegylated form of Mechano Growth Factor (a splice variant of IGF-1) with extended half-life and potent muscle satellite cell activation properties.
Educational Disclaimer: All information on this page is for educational and research purposes only. This does not constitute medical advice, diagnosis, or treatment recommendation. Consult a qualified healthcare professional.