Best Semax Vendors (2026)
Where to buy Semax (also sold as N-Acetyl Semax, NA-Semax amidate): the 33 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.
Research use only. Compound Review scores vendors on documentation — laboratory certificates, lot records, pricing and company identity. Nothing on this page is guidance on human or veterinary use, dosing or health outcomes.
- 1Purgo Labs10/101 certificate verified at the lab10mg vial$34.99−30%$24.49with code
- 22 certificates verified at the lab10mg vial$30.00−33%$20.00sale $25.00, then code
- 3Oneday Compounds10/101 certificate verified at the lab10mg vial$34.99−37%$22.04sale $24.49, then code
- 4TrustedPeps9/101 certificate verified at the lab10mg vial$30.00−10%$27.00with code
- 5Snap Peptides9/101 certificate verified at the lab10mg vial$35.00−10%$31.50with code
- 6ezPeps9/101 certificate verified at the lab10mg vial$39.99−20%$31.99with code
- Peptide Partners7/102 certificates verified at the labprice read 24 Octfree account needed to see the store30mg vial$40.50−10%$36.45with code
- PS Peptides8/102 certificates verified at the labprice read 23 Sep5mg vial$42.99−10%$38.69with code
Show the other 8 partners and their codes
- 8Amplified Labs8/101 certificate verified at the lab10mg vial$45.00−15%$38.25with code
- 91 certificate verified at the lab10mg vial$50.00−28%$36.00sale $40.00, then code
- 10ZC Labs7/101 certificate verified at the lab10mg vial$29.99−16%$25.19sale $27.99, then code
- 12Kylo Peptides7/102 certificates verified at the lab10mg vial$49.95list price
- 13GigaCompounds7/101 certificate opened (vendor-hosted)10mg vial$40.00−10%$36.00with code
- 14Arizen BioLabs6/101 certificate opened (vendor-hosted)10mg vial$39.99−37%$25.19sale $27.99, then code
- 151 certificate opened (vendor-hosted)30mg vial$79.99−55%$36.00sale $40.00, then code
- 16no certificate opened yet30mg vial$85.55−15%$73.14sale $76.99, then code
- Oneday Compounds10/10 · 8 Nov$2.45/mg$24.49 list · 10mg$22.04 with code
- MyPurePeptide10/10 · 5 Nov$2.50/mg$25 list · 10mg$20 with code
- Purgo Labs10/10 · 8 Nov$3.50/mg$34.99 list · 10mg$24.49 with code
Per-milligram price is list price over labelled milligrams; it says nothing about what is in the vial. Code prices are list × (1 − the code's stated discount), not cart-tested against sales. We earn a commission on partner links; the rubric does not read partner status.
Where to buy Semax: 33 vendors, ranked
Reference size 10mg — the size most of these vendors sell. Other sizes we have on record are listed per vendor.
| # | Vendor | Score | 10mg price | Other sizes | Trustpilot | Buy |
|---|---|---|---|---|---|---|
| 1 | 10/10 | $34.99 $3.50/mg · read 8 Nov 2026 | none read | 4.8 101 reviews | $24.49 with code, 30% off | |
| 2 | 10/10 | $25.00$30.00Sale $2.50/mg · read 5 Nov 2026 | none read | 4.8 247 reviews | $20.00 with code, 20% off | |
| 3 | 10/10 | $24.49$34.99Sale $2.45/mg · read 8 Nov 2026 17% since 29 Oct | none read | 4.8 88 reviews | $22.04 with code, 10% off | |
| 4 | 10/10 | $39.99 $4.00/mg · read 25 Oct 2026 | none read | 4.7 85 reviews | ||
| 5 | 9/10 | $30.00 $3.00/mg · read 5 Nov 2026 20% since 1 Nov | none read | 4.8 104 reviews | $27.00 with code, 10% off | |
| 6 | 9/10 | $35.00 $3.50/mg · read 27 Oct 2026 | none read | 4.9 88 reviews | $31.50 with code, 10% off | |
| 7 | ezPepsPartner ILS Laboratories (also Kovera Labs, Freedom Diagnostics, Horizon Analytical) | 9/10 | $39.99 $4.00/mg · read 31 Oct 2026 | none read | 4.8 249 reviews | $31.99 with code, 20% off |
| 8 | 9/10 | $24.99 $2.50/mg · read 5 Nov 2026 | none read | profile removed | ||
| 9 | 9/10 | $50.00 $5.00/mg · read 10 Oct 2026 | 5mg $35.00 | profile removed | ||
| 10 | Janoshik Analytical (also Chromate on some reports) | 9/10 | $59.00 $5.90/mg · read 24 Oct 2026 | none read | no record | |
| 11 | 9/10 | $65.00 $6.50/mg · read 1 Nov 2026 | 5mg $45.00 | 4.6 33 reviews | ||
| 12 | 8/10 | not sold at 10mg | 5mg $42.99 | 4.3 223 reviews | 10% off | |
| 13 | 8/10 | $45.00 $4.50/mg · read 28 Oct 2026 | 5mg $30.00 | 4.9 94 Google reviews | $38.25 with code, 15% off | |
| 14 | 8/10 | $40.00$50.00Sale $4.00/mg · read 8 Nov 2026 | none read | 4.8 88 reviews | $36.00 with code, 10% off | |
| 15 | 8/10 | $15.20 $1.52/mg · read 26 Oct 2026 | none read | 3.9 73 reviews | ||
| 16 | ILS Laboratories (also Freedom Diagnostics, Vanguard Laboratory, BTLabs) | 8/10 | $39.00 $3.90/mg · read 31 Oct 2026 | none read | 4.4 30 reviews | |
| 17 | 8/10 | $45.00 $4.50/mg · read 10 Oct 2026 | none read | profile removed | ||
| 18 | 8/10 | $63.74$84.99Sale $6.37/mg · read 23 Sep 2026 | none read | 4.8 62 reviews | ||
| 19 | Bioviridian, SR Bio Labs (lab-hosted PDFs); Krause Analytical via Finnrick | 8/10 | not sold at 10mg | 5mg $39.99 | profile removed | |
| 20 | 7/10 | $27.99$29.99Sale $2.80/mg · read 8 Nov 2026 | none read | 3.8 2 reviews | $25.19 with code, 10% off | |
| 21 | Peptide PartnersPartner TrustPointe Analytics, Chromate, Kovera Labs, BioRegen (certificate ledger) | 7/10 | not sold at 10mg | 30mg $40.50 | profile removed | 10% off |
| 22 | Kylo PeptidesPartner Freedom Diagnostics, Janoshik Analytical, Vanguard Laboratory, Optiq Health Labs (COA table) | 7/10 | $49.95 $5.00/mg · read 24 Oct 2026 | none read | 3.6 4 reviews | |
| 23 | 7/10 | $40.00 $4.00/mg · read 5 Nov 2026 | none read | 4.8 65 reviews | $36.00 with code, 10% off | |
| 24 | Horizon Analytical (also ILS Laboratories) | 7/10 | $20.99$29.99Sale $2.10/mg · read 31 Oct 2026 | none read | 4.6 451 reviews | |
| 25 | 7/10 | $25.48$39.20Sale $2.55/mg · read 26 Oct 2026 | none read | profile removed | ||
| 26 | ILS Laboratories (on certificates) · page credits Freedom Diagnostics | 7/10 | $32.95 $3.30/mg · read 5 Nov 2026 | none read | profile removed | |
| 27 | 7/10 | $39.99 $4.00/mg · read 11 Sep 2026 | none read | profile removed | ||
| 28 | 7/10 | not sold at 10mg | 5mg $70.00 | profile removed | ||
| 29 | 6/10 | $27.99$39.99Sale $2.80/mg · read 23 Sep 2026 | none read | 4.8 44 reviews | $25.19 with code, 10% off | |
| 30 | 6/10 | not sold at 10mg | 30mg $40.00 | 4.8 176 reviews | 10% off | |
| 31 | 6/10 | not sold at 10mg | 30mg $58.25 | profile removed | ||
| 32 | 6/10 | $32.97 $3.30/mg · read 24 Oct 2026 | none read | profile removed | ||
| 33 | Licensed PeptidesPartner Vanguard Laboratory (printed 'Vangaurd' on COA panels) | 5/10 | not sold at 10mg | 30mg $76.99 | profile removed | 5% off |
What makes Semax different to source
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.
The top 3, explained
Purgo Labs
10/10Affiliate partnerWhat 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 (101 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
MyPurePeptide
10/10Affiliate partnerWhat we can verify
Janoshik Analytical report #223088 for BPC-157 10mg batch 10242025B2 (sample received 17 Aug, analysed 24 Aug 2026): 11.61mg measured, purity 99.635%. We opened it on the lab's own verification page (key 1GTY19EIMQE4) on 30 Sep 2026 — client, manufacturer and batch print as MyPurePeptide. A public COA directory lists 103 report records across 47 products, each with task number, verification key, report batch, the original report image and the sample photograph, plus endotoxin reports for most lots; every product page links its current report. Open catalog with sized prices (BPC-157 10mg $25; TB-500 10mg $25; GHK-Cu 100mg $35; Ipamorelin 10mg $25; Tesamorelin 10mg $40; NAD+ 500mg $35). Legal entity myPurePeptide LLC with a mailing address in Austin, Texas; Visa and American Express at checkout. Trustpilot 4.8 across 247 reviews (read 10 Oct 2026), claimed December 2025.
Net content: Report states 11.61mg measured on a 10mg label (116% — just over our 115% flag line), purity 99.635%; TB-500 #223097 11.54mg / 99.007%
Where it falls short
The printed address (12407 N Mopac Expy Ste 250 PMB 570, Austin) is a commercial mailbox, not premises — identity is awarded on the named LLC with that disclosure. The BPC-157 report measures 11.61mg on a 10mg label, 116% — just over our 115% flag line; TB-500 10mg measured 11.54mg. The vendor's own site says a report 'alone does not confirm the lot shipped'. The GLP-class pages print strike-through reference prices far above the selling price (Semaglutide 10mg 'was $399.99', now $70; Retatrutide 10mg 'was $699.99', now $80) — treat the 'you save' figures as marketing. Zelle is offered alongside cards. Returns: 7-day unopened window with a continuous unboxing video required for damage claims. A domain lookalike (mypurepeptides.com) is disclaimed on the vendor's homepage.
Oneday Compounds
10/10Affiliate partnerWhat we can verify
Read 29 October 2026 through a registered account (prices and the COA library sit behind a login). A WooCommerce store with 49 listings, sized pricing on each, all shown at 40% off a struck list price during a rebrand to 'BY ONEDAY' (BPC-157 10mg $23.99 from $39.99; TB-500 10mg $29.99; NAD+ 500mg $35.99; GHK-Cu 50mg $20.99; MOTS-c 10mg $26.99). The COA library carries 57 entries, every one with at least one lot-numbered certificate, and the links open on ILS Laboratories' own portal: the retatrutide ('OC-3RT') 10mg report COA-2026-3WBETH, lot OC-RT10-106, analysed 2 Sep 2026, reads 99.63% purity, identity retatrutide confirmed, net content 10.31 mg on a 10 mg label, with three vials averaging 10.37 mg, sterility (USP 71), endotoxin and heavy metals passed. Product pages print the lot shipping (BPC-157 10mg: OC-BPC10-104, 99.82%, 10.30 mg). Oneday Enterprises, LLC d/b/a Oneday Compounds, 2326 Washington Blvd, Fourth Floor, Ogden, Utah.
Net content: COA-2026-3WBETH (OC-3RT 10mg, lot OC-RT10-106): net content 10.31 mg on a 10 mg label, three vials 10.22 / 10.31 / 10.59 mg, purity 99.63%, identity retatrutide confirmed; BPC-157 10mg lot OC-BPC10-104 10.30 mg, 99.82%
Where it falls short
Prices and certificates need a free account (no purchase), which since 1 November 2026 no longer costs the ungated point. All sales are final, with damage to be reported within 24 hours; checkout takes cards, but Zelle carries a 5% discount and the FAQ still lists only Zelle, Cash App, Venmo and ACH. The product pages say 'up to 12X' (ILS lots) and the cart says 'up to 16X'; both hold, because Oneday's Ethos Analytics reports carry a wider panel (checked on CJC-1295/Ipamorelin lot OC-CJI10-104, 1 November 2026). GLP-class products are sold by code (OC-2TZ, OC-3RT); the lab confirms retatrutide for OC-3RT.
Purgo Labs for Semax
Purgo Labs sits at #1 of 33 on this page: 10/10 on the rubric, 10mg at $34.99 read 8 Nov 2026. Code HEALTH gives 30% off eligible products. We earn a commission; it did not decide the order above.
Before 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.
Buying Semax — frequently asked
Where can I buy Semax?
As of 8 Nov 2026, 33 of the 106 vendors on our scoreboard list Semax with a price we have read on the product page: Purgo Labs, MyPurePeptide, Oneday Compounds, Panda Peptides, TrustedPeps, Snap Peptides, ezPeps, Pure Lab Peptides, Pure Peptides, Xcel Peptides, Oath Research, PS Peptides, Amplified Labs, Blue Ridge Peptides, Nexaph, Crush Research, Prime Peptides, Everest Peptides, Loti Labs, ZC Labs, Peptide Partners, Kylo Peptides, GigaCompounds, Value Research Labs, Peptira, Puratek Peptides, Mile High Compounds, Prime Lab Peptides, Arizen BioLabs, Elite Edge Biotech, Peptide Pros, Blue Sky Peptide, 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.
Who sells the cheapest Semax?
At the 10mg size, the lowest price we have on record is Nexaph at $15.20 (read 26 Oct 2026) — Store API · sold as 'N-Acetyl Semax Amidate 10mg (10 vials/kit)' $152.00/kit on sale, regular $178.00 · per-vial = kit ÷ 10. It scores 8/10 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.
Which Semax vendor has the best documentation?
Purgo Labs, MyPurePeptide, Oneday Compounds, Panda 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.
Is it legal to buy Semax?
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.
How is this list ordered?
Rubric score first. Among equal scores, our editorial pick (Purgo Labs) comes first, then a short, named list of affiliate partners we choose to list first inside a tie, then the lower verified price per milligram at 10mg, then the larger independent review base. 16 of the 33 vendors here are partners. A partnership never changes a score and never moves a vendor above one with a higher score.
What is the difference between Semax and N-acetyl Semax amidate?
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.
Should I buy Semax as a vial or a nasal spray?
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.