Follistatin 344
FST-344Myostatin-binding research protein.
Also known as: FS-344
Overview
Follistatin 344 is a research protein studied in muscle-development and myostatin-regulation models for its role in tissue growth.
A glycoprotein studied for its ability to bind and inhibit myostatin (GDF-8), the primary negative regulator of muscle growth. By neutralizing myostatin, research models report increased muscle mass — the basis for substantial interest in muscle-wasting and growth research.
Binds and inhibits myostatin and related TGF-beta family ligands, studied for promoting muscle growth in research models.
Molecular information
Follistatin-344 is one of several isoforms; circulating vs. tissue-bound distribution differs by variant.
Pharmacokinetics
Illustrative relative-concentration model derived from published pharmacokinetic research. Curve is normalized and provided for educational comparison only — not a dosing schedule.
Research applications
- Muscle-development research
- Myostatin-regulation studies
- Tissue-growth investigations
Research protocols
Protocols summarized from published research models. Provided for scientific reference only — not dosing guidance for human use.
Observed effects timeline
Aggregated observations reported across research literature. Timing and magnitude vary by model and are not a guarantee of outcome.
Week 1–2
Myostatin-inhibition signaling reported in muscle-research models.
Week 2–4
Muscle-mass changes reported; short courses are typical in study designs.
Research compatibility
Describes how compounds are studied alongside one another in the literature. Not a recommendation to co-administer.
IGF-1 LR3
Both promote muscle growth via different pathways; monitored in research.
PEG-MGF
Complementary growth pathways; overlapping anabolic signaling.
Thymosin Beta-4
Distinct repair vs. myostatin pathways.
How to reconstitute
Reconstitute with bacteriostatic water, swirl very gently, and refrigerate — glycoproteins are fragile and degrade with agitation.
- 1Allow the vial to reach room temperature (15–20 minutes).
- 2Swab the stopper with alcohol and let it air dry.
- 3Add bacteriostatic water slowly down the vial wall.
- 4Swirl gently until dissolved — do not shake.
- 5Refrigerate at 2–8 °C and protect from light.
Quality indicators
Uniform white powder
Lyophilized cake should be white to off-white without discoloration.
Clear solution
Reconstitutes to a clear, colorless, particle-free solution.
Cold-chain integrity
Reconstituted solution requires 2–8 °C storage.
Slight clumping
Small clumps that dissolve completely with gentle swirling are acceptable — shipping can cause minor compaction.
Collapsed or melted appearance
Powder that looks collapsed, melted, or stuck to the vial walls may have been exposed to heat in transit.
Cloudy after reconstitution
Persistent cloudiness, particles, or precipitate after gentle mixing can indicate a degraded or contaminated peptide.
Reported observations & safety
Safety signals reported in the research literature. Compiled for scientific awareness — not medical advice.
- As a systemic growth regulator, broad off-target effects are a theoretical consideration in the literature.
- Human data are limited; most evidence is preclinical or gene-therapy-based.
References & further reading
Follistatin and myostatin regulation of muscle mass (review)
Review of follistatin's myostatin-binding activity and its effect on muscle-mass regulation.
View studyTopics
This entry is provided for educational and informational purposes only. It is not medical advice, a dosing protocol, or a claim of therapeutic benefit. Research compounds are supplied strictly for laboratory and research use — not for human or veterinary consumption.
Active but early-stage research; evidence still developing.
This compound is part of our educational reference and is not currently stocked. Browse the catalogue for available research-grade peptides.
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