Buy Selank from PrymaLab in 5 mg and 11 mg lyophilized vials. Every lot has a published certificate with its HPLC purity and mass-spec identity, and weekday orders ship the same day from Ashland, Kentucky. Prices start at $29.99 a vial.
- Freeze-dried powder in a sealed vial
- Lot certificate: HPLC purity and mass-spec identity
- Weekday orders ship the same day
- Free US shipping over $100
Selank sizes and prices
| Product | Per vial | One vial | Price per mg | 10-vial kit | Subscribe | Current lot | Order |
|---|---|---|---|---|---|---|---|
 Selank 5mgIn stock | 5 mg | $29.99 | $6.00 | $254.99$25.50 a vial | $25.49a vial, save 15% | 99.72% purityPL-26-00088 | Choose options |
 Selank 11mgIn stock | 11 mg | $49.99 | $4.54 | $355.99$35.60 a vial | $41.99a vial, save 15% | 99.45% purityPL-26-00089 | Choose options |
The table compares every size at today’s prices: price per mg, the 10-vial kit and the Subscribe & save price per vial, which ships refills on a schedule you can change or cancel in My Account.
What is Selank?
Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro: the natural tetrapeptide tuftsin (Thr-Lys-Pro-Arg) extended with Pro-Gly-Pro at the C-terminus. PrymaLab supplies it as a white to off-white freeze-dried powder.
| Full name | Tuftsin-Pro-Gly-Pro heptapeptide |
|---|---|
| Sequence | H-TKPRPGP-OH |
| Length | 7 residues, free N- and C-termini |
| Molecular formula | C33H57N11O9 |
| Theoretical mass | 751.9 Da |
| CAS number | 129954-34-3 |
| Appearance | White to off-white lyophilized powder |
| Purity specification | 99.0% or higher by RP-HPLC |
| Storage | −20 °C, desiccated, protected from light |
How every Selank lot is tested
Before a lot is released, PrymaLab Analytical, our laboratory in Ashland, Kentucky, measures its purity by reversed-phase HPLC against a 99.0% specification and confirms its identity by LC-MS against the theoretical mass. The certificate is published with a certificate number and a key, so anyone can verify a printed copy or browse every Selank lot. These are in-house results.
Independent testing guarantee. Have any PrymaLab vial tested by an independent laboratory. If the result is not the compound named on the label, at the purity and amount stated, we refund the order in full and reimburse the cost of the test. Email the lab report and your order number to michael@prymalab.net.
Shipping, payment and support
Same-day shipping
Orders placed Monday to Friday ship the same day by USPS from Ashland, Kentucky, and tracking is emailed when the label prints. US shipping is free over $100 and worldwide over $200.
Five ways to pay
Card, Pay by Bank, Zelle, Cash App or crypto. Every method except card takes 10% off automatically at checkout.
Subscribe & save 15%
Choose Subscribe on the product page and refills ship on their own. Change the schedule or cancel any time from My Account.
Questions
Reply to any order email or call +1 (606) 465-9063, Monday to Friday, 9:00 to 4:00 Eastern.
Questions about buying Selank
Where can I buy Selank online in the US?
PrymaLab sells Selank as a lyophilized research peptide from Ashland, Kentucky. Order on a weekday and it ships the same day by USPS with tracking; US shipping is free over $100.
How much does Selank cost?
A single vial starts at $29.99. The table above shows today’s price per mg for each size, the 10-vial kit price and the Subscribe & save price.
Is PrymaLab’s Selank tested?
Yes. Every lot is analysed for purity by RP-HPLC and identity by LC-MS in our Ashland laboratory before release, and its certificate is published with a number and key you can verify. The independent testing guarantee above covers any outside lab you choose.
Which Selank size should I order?
Choose by the total amount of material you need. The table shows the price per mg of each size and the per-vial price of a 10-vial kit, so you can pick the cheapest way to get that amount. Each size has its own lot certificate.
How is Selank shipped and stored?
Vials ship sealed, as freeze-dried powder. The lot certificate gives the storage condition: −20 °C, kept dry and away from light.
Can I pay without a credit card?
Yes. Pay by Bank, Zelle, Cash App and crypto are all accepted, and each takes 10% off automatically at checkout.
What is the difference between Selank and N-Acetyl Selank?
N-Acetyl Selank carries an acetyl group on the N-terminal threonine, which changes its mass and certificate. PrymaLab stocks standard Selank (751.9 Da).
Do you sell Semax too?
Yes. Semax, the ACTH(4–7)-based heptapeptide, is on the Semax page in 5 mg and 11 mg vials.
Is Selank for human use?
No. PrymaLab sells Selank for laboratory research use only. It is not approved for human or veterinary use, and we do not provide dosing or usage guidance.
Related research peptides
PrymaLab products are sold for laboratory research use only. They are not drugs, foods, supplements or cosmetics, are not for human or veterinary use, and are not intended to diagnose, treat, cure or prevent any disease. Product names and sequences are given for identification only.
