Follistatin 344 1mg 1mg
A recombinant form of the human follistatin protein (344-amino-acid isoform) that binds and neutralizes activin and myostatin.
Observed price
Median $/mg
$119.5/mg
Range $/mg
$88.0/mg–$140.0/mg
This listing
#3 of 4
mid-market
Real / active mg
$139.0/mg
Compared by cost-per-mg against 4 vendor listings of this compound whose size we can read. Real / active mg divides cost-per-mg by measured purity. Read from the certificate, not re-measured by VialGrade.
- Availability
- Unavailable
- Checked
- 2 hours ago
Hands you to peptidepros.net — VialGrade doesn’t sell or take payment
Peptide Pros
Unclaimed page
3
Lab tests
99.9%
Median purity
41
Listings
Real listing aggregated from the vendor's public page. Buying happens on their site, never on VialGrade — outbound links stay off until the affiliate step is approved.
No independent test of Peptide Pros' Follistatin 344 yet
- We hold no independent tests for Follistatin 344 from any maker yet — unknown stays visible.
- Price sits within the normal range for Follistatin 344 — no cheap-fake red flag.
How to verify this yourself
To verify before you buy: ask Peptide Pros for the Janoshik COA for your batch number, then paste it into Verify — VialGrade confirms it's a real, unedited lab record.
Open the Verify toolCompare by real cost
Cheapest Follistatin 344, by price per mg
Vials come in different sizes, so the sticker price lies. This ranks every listing by what a milligram actually costs — with independent test purity where we have it.
| # | Vendor | Size | Price | Per mg | Tested purity | Real $/active mg | |
|---|---|---|---|---|---|---|---|
| 1 | Modern Aminos | 1mg total | $88 | $88.0/mg | — | — | View |
| 2 | Umbrella Labs | 1mg total | $100 | $100.0/mg | — | — | View |
| 3 | Peptide Pros | 1mg total | $139 | $139.0/mg | — | — | View |
| 4 | Swiss Chems | 1mg total | $140 | $140.0/mg | — | — | View |
Real $/active mg divides the price-per-mg by the measured purity — the honest cost of the actual peptide, so a 90%-pure vial isn’t compared as if it were 99%. Too cheap? flags a listing far below the market rate — often underdosing or a fake, not a deal. The crown marks the cheapest non-outlier; best value marks the lowest real cost per active mg.
Understand this compound
What is Follistatin 344?
In clinical trialsa.k.a. FS-344A myostatin-inhibiting protein studied in muscle-growth research.
Good to know: Most human evidence comes from gene-therapy delivery, not the standalone injectable peptide sold in research contexts; myostatin/activin blockade also raises theoretical cardiac and reproductive safety questions.
How does Follistatin 344 work?
A glycoprotein that binds and neutralizes myostatin (GDF-8) and activin A, preventing them from engaging ActRIIB receptors and blocking the SMAD2/3 signaling that normally suppresses muscle growth.
Mechanism of action from published research — how the molecule behaves, not a claim about any product or any human-use effect.
What is Follistatin 344 researched for?
Studied for muscle hypertrophy and muscle-wasting diseases (e.g., inclusion body myositis, Becker muscular dystrophy), primarily via gene-therapy delivery.
- Muscle & performanceStudied in muscle-growth, repair, and physical-performance research.
How far has the research gone?
In clinical trials (gene-therapy form); early-phase human trials exist for inclusion body myositis/muscular dystrophy, but the injectable FS-344 protein sold in research contexts lacks human trial data of its own.
Where the science stands — an approved drug is not the same as the research-grade material a vendor sells, which is unregulated regardless.
What should I check before buying?
- Independent purity. Look for a third-party COA (Janoshik or MZ) showing a measured purity — not just a number the vendor typed.
- Batch match. The strongest evidence is a certificate for the exact batch you’ll receive, attributed to this vendor — check the cross-verification on the listing.
- Vendor reputation. See how the vendor is talked about in the community before trusting a new name.
Research context only — VialGrade never gives dosing, medical, or human-use guidance.
The lab evidence
What we could verify
Each row answers a different question. Passing the identity test doesn’t mean it’s sterile or correctly dosed — we show each answer separately.
Identity — independent test
UnknownNo independent third-party COA is advertised or on record for this listing.
Measured purity (HPLC)
UnknownNo independent purity figure is on record for this listing.
Batch traceability
UnknownNo specific batch on this listing has been matched to an independent record.
Sterility & endotoxin
Not testedA purity COA does not measure sterility or endotoxins — no such test is on record.
Dose / fill accuracy
UnknownVialGrade does not independently measure vial fill or delivered dose.
No third-party testing to cross-check
This listing doesn't advertise independent lab testing, and we don't hold an independent record for Peptide Pros's Follistatin 344. Absence of a certificate isn't proof of anything — but there's nothing here to verify.
- Independent testing. No third-party COA advertised or on record.
Cross-checks the vendor’s testing claim against independent lab records. Purity is read from the lab's certificate as issued — VialGrade doesn't re-run the assay or sample the vial. It reflects one lab's result for one submitted batch, not every vial. Never a statement that a product is safe, sterile, or correctly dosed.
Research-use-only — not FDA-approved
Sold “for research use only,” this compound is not FDA-approved for human use and has not been evaluated for safety, purity, or sterility in people. It is generally not a scheduled controlled substance, so buying it as a research chemical is typically not itself a drug crime — but marketing or using it as a drug is not lawful, and it is not a dietary supplement.
Read the full US legal overview →General information, not legal or medical advice. VialGrade sells nothing and encourages no human use.
Same compound
See the full Follistatin 344 market — all 6 vendors, price history & lab tests