Where to buy Semax (also sold as N-Acetyl Semax, NA-Semax amidate): the 10 vendors below are the ones we have a dated product-page price for, ranked on documentation first and price second. Nothing here is typed from memory — every number links to a date.
Reference size 10mg — the size most of these vendors sell. Other sizes we have on record are listed per vendor.
| # | Vendor | Rubric | 10mg price | Other sizes | Trustpilot | Buy |
|---|---|---|---|---|---|---|
| 1 | Purgo LabsPartner SteriGenix · Freedom Diagnostics | 10/10 | $27.99 ($2.80/mg · 23 Sept 2026 · was $34.99 · sale; list $34.99 struck) | — | 4.7 (88 reviews) | HEALTH 20% off every order |
| 2 | Chameleon Peptides Janoshik Analytical · Vanguard | 10/10 | not sold at 10mg | 5mg $68.40 | 5.0 (546 reviews) | Visit |
| 3 | TrustedPepsPartner Freedom Diagnostics (on certificates) | 9/10 | $20.00 ($2.00/mg · 23 Sept 2026 · sale; list $30.00 struck; sold as 'Semax 10MG') | — | 4.7 (90 reviews) | HEALTH 10% off every order |
| 4 | Mile High Compounds Kovera Labs · Chromate | 8/10 | $39.99 ($4.00/mg · 11 Sept 2026 · sale price; list $49.99) | — | 4.8 (503 reviews) | Visit |
| 5 | Everest Peptides Freedom Diagnostics | 8/10 | $63.74 ($6.37/mg · 23 Sept 2026 · sale; list $84.99 struck) | — | 4.8 (51 reviews) | Visit |
| 6 | Puratek PeptidesPartner ILS Laboratories (on certificates) · page credits Freedom Diagnostics | 7/10 | $32.95 ($3.30/mg · 23 Sept 2026 · list price; sold as 'Semax 10 mg') | — | profile removed | Visit |
| 7 | PS PeptidesPartner North American Diagnostics | 7/10 | not sold at 10mg | 5mg $42.99 | 4.2 (175 reviews) | HEALTH 10% off |
| 8 | Elite Edge BiotechPartner Baler Lab | 6/10 | not sold at 10mg | 30mg $40.00 | 4.8 (175 reviews) | 10COMPOUNDRE 10% off |
| 9 | Arizen BioLabsPartner Janoshik (on certificates) | 6/10 | $27.99 ($2.80/mg · 23 Sept 2026 · sale; list $39.99 struck) | — | 4.8 (43 reviews) | HEALTH 10% off |
| 10 | Licensed PeptidesPartner Vanguard Laboratory (printed 'Vangaurd' on COA panels) | 5/10 | not sold at 10mg | 30mg $76.99 | profile removed | Affiliate5 5% off |
Semax is a short synthetic peptide derived from a fragment of ACTH, developed in Russia and sold there as a nasal product. On the research market it is sold in three forms that are priced on different bases: a lyophilised vial, a pre-made nasal solution priced by volume, and modified variants (N-acetyl Semax, N-acetyl Semax amidate) that are different molecules from the parent compound.
This page covers lyophilised vials of Semax itself. Solution listings are excluded. Check the product name on the vendor's page before ordering, because a price for the amidate is not a price for Semax.
Vial sizes span a wide range for this compound, so the reference size used for ordering is the one most vendors sell, and every size we have read is listed per vendor.
What we can verify
Publishes per-lot COAs naming the testing laboratory — SteriGenix and Freedom Diagnostics — with lot numbers, test dates, measured net peptide content and direct verify-at-lab links. HPLC and mass spectrometry testing, US-based fulfilment from Scottsdale, Arizona, same-day dispatch on weekday orders before 2PM EST, and a 60-day money-back guarantee.
Net content: Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
Where it falls short
Smaller independent review base than several competitors (80 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
What we can verify
Public COA & Batch Verification Ledger covering 44 products and 87 batches with 539 COA links, including 380 Janoshik Analytical references (ISO 17025) and 141 Vanguard references. 4.9 across 311 Trustpilot reviews. Card, Apple Pay and ACH payments; free FedEx 2Day shipping from Sacramento; legal entity disclosed (Origin Sourcing Group LLC).
Net content: Janoshik report #194142 (BPC-157 10mg, batch B002) states 11.56mg measured vs 10mg label, 99.557% purity — read on verify.janoshik.com 6 Sep 2026
Where it falls short
Catalog includes hormone-class products (HCG, HGH 191AA, HMG) alongside peptides, a regulatory-sensitive class. Not an affiliate partner — we earn nothing from this vendor, and it ranks where the rubric puts it.
What we can verify
4.7 across 90 Trustpilot reviews. Certificate images with batch codes viewable without an account. Sized pricing (BPC-157 10mg $30.00).
Net content: Certificate reports Net Peptide Content 10.50mg vs 10mg label, 98.509% purity (lot TPBP32826)
Where it falls short
The lab (Freedom Diagnostics) appears only on the certificate image, never in page text; the certificate carries a lab search code (Trus2604010178) and reports 10.50mg vs 10mg label. No legal entity and no address on About, Contact or Terms — 'Location: United States' only. Weight-loss compounds sold as 'TP-TZ' and 'TP-RT' with the identity never stated; those prices are excluded from our index. Domain under a year old.
Purgo Labs sits at #1 of 10 on this page: 10/10 on the rubric, 10mg at $27.99 read 23 Sept 2026. Code HEALTH gives 20% off every order. We earn a commission; it did not decide the order above.
Visit Purgo Labs — code HEALTHBefore you order, check the batch
A ranking tells you which vendors have good practices; it cannot tell you about the specific vial you receive. When your order arrives, compare the batch number on the label to the certificate. If they do not match, or there is no batch number, the documentation does not cover what you were sent, regardless of who you bought from. How to read a peptide COA.
As of 23 Sept 2026, 10 of the 59 vendors on our scoreboard list Semax with a price we have read on the product page: Purgo Labs, Chameleon Peptides, TrustedPeps, Mile High Compounds, Everest Peptides, Puratek Peptides, PS Peptides, Elite Edge Biotech, Arizen BioLabs, Licensed Peptides. Every one of them is scored on the same 10-point rubric; the table above shows the score, the dated price and what you can verify before ordering.
At the 10mg size, the lowest price we have on record is TrustedPeps at $20.00 (read 23 Sept 2026) — sale; list $30.00 struck; sold as 'Semax 10MG'. It scores 9/10 on documentation. Price is the second sort key on this page, not the first, because an underdosed vial at a low price is the most expensive outcome.
Purgo Labs and Chameleon Peptides share the top score at 10/10: named laboratory, certificates that resolve on the laboratory's own site, measured milligrams against the label, and a published legal identity. The per-criterion evidence, with dates, is on each vendor's review page.
Semax is sold by these vendors as a research chemical for laboratory use, not for human consumption; none of it is FDA-approved in this form. Legality of purchase varies by jurisdiction and the compound, and it is your responsibility to know your local rules. Our pages assess documentation and pricing; they are not legal or medical advice.
Rubric score first. Among equal scores, the lower verified price per milligram at 10mg. Then the larger independent review base. Affiliate partnership is not an input: 7 of the 10 vendors here are partners and they sit wherever the evidence puts them.
They are related but different molecules. N-acetyl Semax adds an acetyl group at one end; the amidate form changes the other end as well. Vendors sell all three, sometimes without distinguishing them clearly. The certificate's identity check and stated molecular weight tell you which one you have.
This page ranks vials with a stated milligram amount. A spray is priced by volume, and its peptide content depends on a concentration the certificate may not verify. If you need a comparison across vendors, the vial is the comparable product.