Name: Semax 11mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-XA11
Price: 70.00 USD
Availability: InStock

Semax at a glance

Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. Its first four residues match the 4-7 segment of adrenocorticotropic hormone, and the added Pro-Gly-Pro tail slows breakdown by peptidases. It was developed by researchers at the Institute of Molecular Genetics in Moscow. Although it descends from ACTH, it is not treated as a hormonal peptide, because the shortened sequence no longer carries the adrenal-stimulating activity of the parent molecule.

Price and availability

A kit of 10 vials at 11mg each (110 mg in total) from HK Peptide, shipped from Hong Kong, Hong Kong. The price is $70.00, or $0.636 per milligram of peptide. Across 20 brands listing Semax here, the middle half of prices falls between $0.60 and $3.30 per mg; this kit is inside that range. Checkout goes into escrow first; the funds move to HK Peptide once delivery is confirmed.

This listing: HK Peptide Semax

Brand: HK Peptide
Kit: 10 vials × 11 mg (110 mg in total)
Price per vial: $7.00
Price per mg: $0.64
Other strengths: 5mg $40.00
Also sold by: Lilipeptide Semax $52.00 · Vital Edge Science Semax $45.00 · Peptide Express 10mg $40.00 · EuropePeptide 10mg $25.99 · Purus Peptides 10mg $39.00 · Lab77 Peptides 10mg $36.00

Lab testing

HK Peptide published a Janoshik #107748 report for this compound. Test: Purity & Content (HPLC). Result: 99.33% purity · 11.30 mg. Tested Feb 13, 2026. Verification key 962A5E58THAT 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

Much of the mechanistic literature centers on neurotrophins. Rodent studies report that Semax raises levels of brain-derived neurotrophic factor and its receptor TrkB in the hippocampus and cortex, and gene-expression work after experimental ischemia describes shifts in inflammatory and vascular transcripts. Other papers propose effects on dopamine and serotonin turnover and possible interactions with melanocortin receptors, which would fit its ACTH ancestry. Antioxidant-like activity has also been described. How these observations connect, and which matter most, has not been settled, and the data come chiefly from animal tissue.

Research and regulatory status

Semax holds a different regulatory position from most catalogue peptides. Russian authorities list it as a registered medicine, supplied as nasal drops, and clinical reports from Russia cover stroke and cognitive disorders. Those studies are mostly small and published in Russian-language journals, which limits outside scrutiny. Semax has not been approved by the FDA or the EMA, and in the United States and Europe it is handled as an unapproved research compound with a largely preclinical evidence base.

Checking the lab data

Identity is best confirmed by mass spectrometry showing the mass expected for Met-Glu-His-Phe-Pro-Gly-Pro, with any N-acetyl or amidated variant stated explicitly when a vendor sells a modified form. HPLC purity should come from a chromatogram, not a bare figure. Because the sequence contains methionine, oxidized impurities are a known risk, so a clean main peak matters. Expect a white, intact lyophilized cake and a batch-matched, dated report.

This listing has an independent lab report attached; the testing panel above summarises what the tested sample contained against its label.

Listing details

Compound: Semax
Synonyms: ACTH(4-10) analog
Class: Synthetic ACTH-fragment neuropeptide
Format: Lyophilized (freeze-dried) powder
Vial strength: 11mg
Vials per kit: 10
Total content: 110 mg
Price per mg: $0.636
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 11 mg vial dissolved in 2 mL gives 5.5 mg/mL, or 11 mg/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

What is the difference between Semax and N-acetyl Semax?

N-acetyl Semax carries an acetyl group on the N-terminal methionine, a change intended to further slow enzymatic degradation. Some listings add an amide at the C-terminus as well. These are distinct molecules with different masses, so the analytical report should state exactly which form was tested.

Why does the Pro-Gly-Pro ending matter?

Short ACTH fragments are cleared by peptidases very quickly. The Pro-Gly-Pro extension was added to make the peptide more resistant to that breakdown, and the tripeptide itself has been studied separately for activity of its own. Its presence is one reason Semax persists long enough to be measured in tissue studies.

How much Semax is in this listing?

10 vials of 11mg each — 110 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.