Name: Selank 5mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-SK5
Price: 40.00 USD
Availability: InStock

Selank at a glance

Selank is a synthetic seven-amino-acid peptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro. Its first four residues reproduce tuftsin, a short immunoactive fragment of the immunoglobulin G heavy chain; the trailing Pro-Gly-Pro motif was appended to slow breakdown by peptidases. The compound came out of Russian academic research and is registered as a medicine in Russia, though it has no approval in the United States or the European Union. Research supplies arrive as a white lyophilized powder.

Price and availability

This is HK Peptide‘s kit of 10 vials at 5mg each (50 mg in total), dispatched from Hong Kong, Hong Kong. The price is $40.00, or $0.80 per milligram of peptide. 18 brands sell Selank on GLP1 Forum Escrow, with a typical price of $0.693–$3.80 per mg (median $0.90); this listing is inside that range. Checkout goes into escrow first; the funds move to HK Peptide once delivery is confirmed.

This listing: HK Peptide Selank

Brand: HK Peptide
Kit: 10 vials × 5 mg (50 mg in total)
Price per vial: $4.00
Price per mg: $0.80
Other strengths: 11mg $80.00
Also sold by: TFC Peptides 5mg $35.00 · Imperial Peptides 5mg $19.00 · Cyprus Peptides 5mg $97.00 · Lilipeptide Selank $52.00 · Vital Edge Science Selank $45.00 · Peptide Express 10mg $46.00

Lab testing

HK Peptide published a Janoshik #227962 report for this compound. Test: Purity & Content (HPLC). Result: 99.66% purity · 11.86 mg. Tested Sep 15, 2026. The vial tested was a different strength than this listing, so treat it as evidence for the compound and ask for the batch COA for this exact strength. Verification key ZVH6NCXA545V can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

What it is studied for

Proposed mechanisms span the nervous and immune systems. In rodent work, Selank has been reported to influence GABAergic transmission, possibly by modulating how GABA-A receptors respond to their ligands rather than occupying the benzodiazepine site directly. Other papers describe changes in serotonin and dopamine metabolism, shifts in hippocampal brain-derived neurotrophic factor expression, and inhibition of enkephalin-degrading enzymes, which would prolong endogenous opioid peptide signaling. On the immune side, its tuftsin heritage links it to macrophage activity, and studies have measured altered interleukin-6 and other cytokine transcripts. None of these pathways has been established as the primary mode of action.

Research and regulatory status

Most Selank papers originate from a small network of Russian institutions, and many appear in Russian-language journals. The published work includes rodent anxiety and memory paradigms, gene-expression studies, and small clinical reports in patients with anxiety disorders associated with its domestic registration. Independent Western replication remains limited, and large double-blind trials of the kind the FDA or EMA would require have not been reported. Outside Russia, it is treated as an investigational research compound.

Checking the lab data

A useful certificate confirms the seven-residue sequence by mass spectrometry, with the observed mass matching the theoretical value for Thr-Lys-Pro-Arg-Pro-Gly-Pro, and reports HPLC purity from a dated, batch-numbered run. Because related analogues such as N-acetyl variants are also sold, the report should state plainly whether the peptide is unmodified. The vial should hold a compact white or off-white lyophilized cake with no visible moisture or discoloration.

An independent lab report is attached to this listing, and the panel above shows the measured result next to the labelled amount.

Listing details

Compound: Selank
Synonyms: Tuftsin analogue
Class: Synthetic heptapeptide (tuftsin derivative)
Format: Lyophilized (freeze-dried) powder
Vial strength: 5mg
Vials per kit: 10
Total content: 50 mg
Price per mg: $0.80
Sold by: HK Peptide
Ships from: Hong Kong, Hong Kong
Lab report: Independent report attached

Storage and preparation

Keep unopened freeze-dried vials cold, sealed and out of the light; moisture is what degrades a lyophilized cake fastest. After reconstitution, refrigerate the solution and work within the stability window your protocol sets.

Concentration arithmetic: one 5 mg vial dissolved in 2 mL gives 2.5 mg/mL, or 5 mg/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

What is N-Acetyl Selank, and is it the same compound?

N-acetyl Selank carries an acetyl group on its N-terminus, a modification some vendors use with the aim of further slowing degradation. It is a distinct molecule with a different mass and a much thinner research record than the parent peptide. Listings and analytical reports should name the form explicitly, and the two should not be treated as interchangeable.

How does Selank relate to Semax?

Both peptides emerged from Russian research programs and share a Pro-Gly-Pro stabilizing tail, but their parent sequences differ. Semax is built on a fragment of adrenocorticotropic hormone, while Selank is built on tuftsin. They are studied in overlapping neuroscience areas yet remain separate compounds with separate literatures.

How much Selank is in this listing?

10 vials of 5mg each — 50 mg in all. Where a lab report exists, the testing panel above shows what the brand's tested sample actually measured.

What if the parcel never arrives?

Open a claim from your order page. The payment is still in escrow at that point, so a claim decided in your favour is refunded to your Escrow Wallet.

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.