Each box of 10 vials carries a Peptworks label and a unique QR → the batch CoA (HPLC + heavy metals), verified by a third party. Checkable by you and your customers.
🔗 Peptworks.euFollistatin-344
| Units (combined total) | Discount | €/vial | This product ×100 |
|---|---|---|---|
| 100 | — | €45,00 | €4500 |
| 300 | −18% | €36,90 | €11.070 |
| 500 | −25% | €33,75 | €16.875 |
| 1000 | −32% | €30,60 | €30.600 |
Combine any reference: the discount applies to the combined total of vials, not per product. A single tier, not stacked.
What is — Follistatin-344
Follistatin-344 is a recombinant single-chain glycoprotein isoform of follistatin, supplied by Peptworks as a lyophilized 1 mg vial for laboratory Research Use Only (RUO). It is a research reagent — not a medicine, supplement, cosmetic or medical device — and is not intended for human or animal consumption. It is available to B2B buyers as bulk unbranded vials or as white-label product, from stock held inside the EU.
In research models, follistatin acts as a high-affinity binding protein for several members of the TGF-β superfamily, most notably myostatin (GDF-8) and activin. By binding these ligands, it prevents them from engaging their type II receptors (such as ActRIIB), thereby modulating downstream SMAD2/3 signaling associated with skeletal-muscle and tissue-growth pathways. Follistatin-344 is one of the naturally occurring splice isoforms used as a tool to study this ligand-trap activity in vitro and in animal systems.
Research
- Myostatin (GDF-8) and activin antagonism / ligand-trap studies
- Skeletal-muscle hypertrophy and regeneration models
- TGF-β superfamily SMAD signaling research
- Fibrosis and tissue-remodeling animal models
- Reproductive endocrinology (activin / FSH regulation)
- Longevity, muscle-aging and sarcopenia model development
Advantages
- In rodent models, local follistatin expression has been studied in association with increased skeletal-muscle mass.
- Used in vitro to probe neutralization of myostatin (GDF-8) and downstream SMAD2/3 signaling.
- Investigated in animal fibrosis models for effects on TGF-β-driven tissue remodeling.
- Applied as a tool reagent in reproductive-endocrinology research on activin and FSH regulation.
- Explored in preclinical longevity and muscle-aging (sarcopenia) research models.
Safety
- Off-target modulation of activin signaling reported in animal studies, with observed effects on reproductive tissues.
- Altered follicle-stimulating hormone (FSH) dynamics observed in endocrinology research models.
- Immunogenic responses to recombinant protein reported in some animal-model contexts.
- Handling note: as a lyophilized protein, loss of activity or aggregation can occur with improper reconstitution or repeated freeze-thaw cycles.
Ideal for
- Myostatin / activin pathway inhibition assays
- Skeletal-muscle cell-culture and hypertrophy research
- Comparative TGF-β superfamily signaling studies
- Reproductive-endocrinology (activin / FSH) research
- Longevity and sarcopenia model development
- Analytical reference and HPLC method development
This product is a laboratory reagent supplied strictly for research. It is not a medicine, food or supplement and is not for human or veterinary use. It must be handled by qualified professionals under laboratory conditions.
Frequently asked questions
Where can I buy Follistatin-344 in bulk in the EU?
Peptworks supplies Follistatin-344 (1 mg lyophilized vial) wholesale to businesses from stock already inside the EU. Because units ship intra-community, there are no customs formalities and delivery is typically 3-5 business days. It is sold for Research Use Only (RUO), B2B only, not to end users.
What is the wholesale price per vial for Follistatin-344?
Pricing is per vial with combined-volume discounts on the whole order: 100 units = €45.00/vial (base), 300 units = €36.90/vial (-18%), 500 units = €33.75/vial (-25%), 1000 units = €30.60/vial (-32%). A single tier applies to your combined total units; discounts are not stacked. Minimum order is 10 units (1 box).
Can I order white-label Follistatin-344 with my own brand?
Yes. Peptworks offers two formats: bulk unbranded vials, or white-label vials labelled with your own brand and boxed. A one-time label setup fee of €180 applies to orders under 100 units and is free from 100 units. Each box also carries the Peptworks label with a unique QR that links to that batch's Certificate of Analysis.
What is the minimum order quantity?
The minimum order is 10 units per reference, which equals one box; vials ship in boxes of 10. Volume pricing begins at the 100-unit combined tier, so many resellers consolidate references to reach a better per-vial rate.
How is the Certificate of Analysis (CoA) verified?
Every batch has an independent Certificate of Analysis covering HPLC purity (≥98%) and heavy metals. The box label carries a unique QR code that links to that specific batch's CoA, and it can be verified independently through Peptworks. This gives resellers and their customers a traceable quality trail per batch.
How do I pay and how is Follistatin-344 shipped?
Payment is by USDC bank transfer / invoice; no card payment is taken on the site. Orders ship from EU stock as intra-community deliveries (no customs), usually in 3-5 business days. The full Peptworks site is available in 10 languages (ES, EN, DE, FR, PT, IT, NL, PL, CS, EL).