Semax peptide (10 mg vial)

In brief: ALTA PEPTIDES supplies Semax (ACTH(4-7)-Pro-Gly-Pro) as a 10 mg lyophilised vial for £21.99 (£2.20/mg), with the certificate of analysis for lot R26042903 published, held in UK stock and dispatched the same working day before 1pm. Supplied for laboratory research only, not for human consumption.

New to Semax? Read our guide, Semax vs Selank: what each peptide is and how the research differs, for what it is, what the research covers and how it is handled.

What is Semax?

Semax is a synthetic heptapeptide, Met-Glu-His-Phe-Pro-Gly-Pro, built from a fragment of adrenocorticotropic hormone (ACTH 4-7) with a Pro-Gly-Pro tail that slows enzymatic breakdown. It was developed at the Institute of Molecular Genetics in Moscow and has been in clinical use in Russia since 1994. We supply the peptide as lyophilised powder at 99%+ HPLC purity in a 10 mg sealed vial for laboratory research.

This Semax 10mg vial is the raw Semax peptide for laboratory work; the Semax vial ships from UK stock.

What the research covers

Semax has a larger human literature than most research peptides. A controlled study in healthy volunteers reported improved attention and short-term memory across an eight-hour shift after intranasal administration, with effects recorded 20 to 24 hours later. Rodent studies show rapid increases in BDNF and TrkB expression in the hippocampus and activation of dopaminergic and serotonergic systems, without stimulant-like cardiovascular effects. It is not licensed as a medicine outside Russia.

Vial or finished spray?

This vial is the raw peptide for laboratory work. If you want Semax as a finished, preserved, metered nasal spray sold as a supplement for personal use, that is a different product with a different legal footing, made by our sister brand COGENT and sold at cogentnootropics.co.uk. We do not supply this vial for that purpose.

Buying Semax in the UK

Not controlled, not a licensed medicine in the UK, sold here as a research chemical. UK stock, certificate of analysis published per lot, same-day dispatch before 1pm. See also Selank, its sister peptide.

Semax price (UK)

Prices include VAT. Shipping is £4.95 by Royal Mail Tracked 48, free on orders over £75, and sealed items can be returned within 14 days. Ships from UK stock with the lot certificate for the vial you receive.

Quality and testing

The certificate of analysis for lot R26042903 of Semax is published on our certificates page and linked above. It is the manufacturer's QC batch certificate for the bulk lot the vials were filled from, reporting purity by HPLC (identity is not stated on this certificate), with a purity result of 99.23%. ALTA's own independent third-party test of the finished vials from this lot is pending and will be published on the same row when it arrives. The lot number on the vial label matches the certificate. Note: Certificate retest date has passed; a fresh test is due. Specification: ≥ 99% (HPLC), supplied as lyophilised powder, 2 ml glass vial, sealed, 10 mg per vial.

Reconstitution and handling

Semax arrives as a lyophilised cake under an aluminium crimp seal. Let the vial reach room temperature before opening so that condensation does not form on the powder. Swab the stopper with an alcohol swab, draw the chosen volume of bacteriostatic water (our bacteriostatic water guide explains why it is used rather than sterile water) with a sterile syringe, and add it slowly down the inside wall of the vial rather than onto the powder. Swirl gently until clear; never shake, which can denature the peptide. Label the vial with the date and concentration. The peptide calculator converts vial amount and diluent volume into concentration, millilitres and U-100 syringe units for any target amount. Sealed vial: -20 °C, protected from light. Reconstituted: 2 to 8 °C, use within 4 weeks.

Lot traceability

Every Semax vial carries a printed lot number and expiry. The same lot number appears on the certificate of analysis for that lot on our certificates page, which names who issued it (the manufacturer's QC laboratory for a batch certificate, or the outside laboratory for a third-party report) so it can be checked directly. ALTA's own independent test of each lot is published on the same row as it arrives. If the number on your vial does not match a certificate on our site, contact support before using it. Certificates are kept online for the life of the product plus two years.

Related products

Selank, BPC-157, TB-500, and everything else in Brain & Focus or the full range. Reconstitution supplies: bacteriostatic water, insulin syringes and alcohol swabs.

Related reading in the Journal

• Semax vs Selank: what each peptide is and how the research differsAn ACTH fragment analogue and a tuftsin analogue, both from the same Moscow institute, with different proposed mechanisms and a shared evidence gap outside Russia.
• What are peptides? Amino acid chains, proteins, hormones and synthesisThe chemistry behind the word: what a peptide chain is, where the line with proteins sits, what peptide hormones do, and how a synthetic peptide is built one residue at a time.
• Are peptides legal in the UK? Research peptides and the law explainedWhich laws actually apply to research peptides in the UK, what a supplier can and cannot do, and why research use only is a legal condition rather than a slogan.

Handling and buying guides: How to reconstitute peptides: a laboratory guide, How to store peptides, and how long lyophilised peptides last at room temperature, How to read a peptide certificate of analysis.

Handling and storage

Sealed vial: -20 °C, protected from light. Reconstituted: 2 to 8 °C, use within 4 weeks. Keep sealed until use. Allow the vial to reach room temperature before opening to avoid condensation on the powder. Reconstitute with bacteriostatic water added slowly down the wall of the vial; do not shake. Our calculator covers the arithmetic.