Peptide Watchdogs
Price index / Selank
Nootropic

Selank

CAS 129954-34-3 Also sold as SEL

A nootropic research peptide. Live vendor vial prices, sorted lowest first.

For research use only. Not for human consumption. No health, dosing, or usage claims are made.

What Selank is

Selank is a synthetic heptapeptide derived from the immunopeptide tuftsin. It is not an FDA-approved drug and is sold only as a research chemical.

Type7 amino acids (heptapeptide)
Molecular formulaC33H57N11O9
Molecular weight751.9 g/mol
CAS number129954-34-3
PubChem CID11765600 ↗
Amino-acid sequenceThr-Lys-Pro-Arg-Pro-Gly-Pro
CategoryNootropic

Also designated TP-7; a tuftsin analog. On-file CAS 129954-34-3 matches PubChem, and material is commonly supplied as the acetate (diacetate) salt.

Regulatory status: As of 2026, selank is not FDA-approved; selank acetate (TP-7) was nominated for the compounding bulk-substances list and placed in Category 2, but that nomination was later withdrawn by the nominator (FDA Category 2 page, current as of 04/22/2026).

Vial price (low)
$40
Vial price (high)
$70
Vial sizes
5, 10 mg
Vendors listing
5
Verified
—

Price by vial size

sourced market ranges · Jul 2026
5 mg vial
$50–$50
10 mg vial
$40–$70

Typical vendor vial prices, Jul 2026. Exact prices load with verified listings.

Compare vendors

vendor prices · lowest first
VendorVial priceCoupon
Simple Peptide
$0.05Best — View vendor ›
Precision Research Peptides
$0.13 WATCHDOG20 View vendor ›
Prime Lab Peptides
$0.16 — View vendor ›
Koi Peptides
$0.18 — View vendor ›
Protide Health
$0.20 — View vendor ›
BioInfinity Lab
$0.22 — View vendor ›
Kaia Peptides
$0.33 — View vendor ›
BioLongevity Labs
$0.50 — View vendor ›
Mile High Compounds
$1 — View vendor ›
PSPeptides
$3.60 — View vendor ›
Skye Peptides
$8.80 — View vendor ›
Comparing vial prices. Vial price is what you actually pay — no derived math to get wrong. Just match the vial size across vendors: a 10 mg vial against another 10 mg vial. Sizes for this compound are listed above. Need to plan a reconstitution? Use the calculator.

Where it shows up in research

literature areas · not a health claim
Tuftsin-analog and immunomodulatory-peptide chemistryAnxiety and behavior animal-model researchNeuropeptide and GABAergic-signaling studies

Studied in animal behavioral and cell models of neuropeptide signaling; these are areas of laboratory study and do not indicate a proven effect in people.

Storage & handling

Planning a reconstitution? Use the calculator — it is math for handling a vial, not dosing.

Looking at this for yourself? Selank is a research compound — whether it is right for a person is a medical question we cannot answer. Talk to a licensed clinician. Everything on this page is for laboratory research use only.

Sources & further reading: PubChem CID 11765600 (NCBI) · FDA — Bulk Drug Substances That May Present Significant Safety Risks (Category 2)
How we source this ›

Frequently asked

How much does Selank cost?
About $40–$70 per vial, depending on vial size. Compare the same size across vendors.
Why do Selank prices vary so much?
Vial sizes differ, so always compare the same vial size across vendors. Batch testing, stock, and pack discounts move the true cost too — see what "Verified" means.
How are Selank vendors verified?
A vendor earns a Verified badge only after independent batch testing (HPLC purity + mass-spec identity) checks out against its COA. Verification is never for sale.

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