Buy Semax for Research: 3 Vendors Compared (Prices, COAs)
Checked, not rated · Updated 3 October 2026
Semax is not approved by FDA for human use, and it is sold in the US labelled for research use only. All 3 vendors I check sell it online (Next Level Pharm, Spartan Peptides and BioEdge Research Labs), from $18.99 for a 5 mg vial as of 3 October 2026.
BioEdge Research Labs' product is a different form (N-acetyl Semax amidate 10 mg vial), with a different mass, so check that its COA names that form.
The table compares vendors on FDA record, testing lab, batch COAs and price. Before buying from anyone, run my vendor checklist.
- Class
- ACTH-derived peptide
- Background
- Sold as a nootropic for focus, memory and mood.
- Human evidence
- Limited human data
The evidence, risks and legal detail: my Semax guide. Dosing and vial maths: Semax dosage.
Semax vendors compared
The checklist results come from my review of each vendor and cover the whole store. A vendor can publish COAs for some products and not others. The featured vendor is pinned first; the order is not a ranking.
| Vendor | Product | Price | FDA record | Names its lab | Batch COAs | Card payment | Link |
|---|---|---|---|---|---|---|---|
| Next Level PharmFeaturedMy Next Level Pharm review | 5 mg vial | $18.99as of 3 October 2026 | No warning letter found | Yes | Yes | Yes | View product → |
| Spartan PeptidesMy Spartan Peptides review | 30 mg vial | $159.00as of 3 October 2026 | No warning letter found | Yes | Not verified | Not verified | View product → |
| BioEdge Research LabsMy BioEdge Research Labs review | N-acetyl Semax amidate 10 mg vial | $39.00as of 3 October 2026 | No warning letter found | Yes | Yes | Not verified | View product → |
Prices are for the product named, as shown on the vendor's own product page on the date given. They change often. Checklist results were verified on 3 October 2026. All vendors and how they compare.
What a Semax COA should show
A certificate of analysis (COA) is the lab report for one batch. For Semax, check these:
- Identity by mass spectrometry, with the expected and the measured mass side by side. For Semax, expect about 813.9 Da (C37H51N9O10S); the sequence is 7 amino acids, MEHFPGP.
- N-acetyl semax and N-acetyl semax amidate are modified, different molecules with different masses. The COA should match the exact name on the label.
- Purity by HPLC for this batch, shown as a chromatogram as well as a percentage.
- A lot number that matches your vial or pack, the test date and the lab's name, so you can confirm the certificate on the lab's own site.
A purity figure does not cover sterility or bacterial endotoxins; a COA covers those only if it reports separate tests for them. Line by line: how to read a peptide COA.
Red flags when buying Semax
- A product page calling Semax an approved medicine without saying where.
- No certificate of analysis for the batch you will receive, or one without a lot number or a named lab.
- Dosing instructions or treatment claims for people on the product page.
- An FDA warning letter naming the seller. Search fda.gov before you pay.
- No way to pay with buyer protection, such as a credit card.
Common questions
Where can I buy Semax?
Online, from research vendors that label it for laboratory use only. I list 3 checked vendors: Next Level Pharm, Spartan Peptides and BioEdge Research Labs, from $18.99 for a 5 mg vial as of 3 October 2026. Before you pay, confirm the batch COA on the testing lab's own site.
Is Semax for sale legally?
Semax is sold in the US labelled for laboratory research use only. It is not approved by FDA for human use, and it cannot lawfully be marketed as a supplement or a medicine. This is general information, not legal advice.
Do I need a prescription for Semax?
No US-approved Semax product exists for a doctor to prescribe. Research vendors sell it without a prescription, labelled for laboratory use only. It is used clinically in Russia, which is why some vendors call it an approved medicine. It is not approved in the US.
How much does Semax cost?
On the vendors' own product pages: Next Level Pharm, 5 mg vial, $18.99 (as of 3 October 2026); Spartan Peptides, 30 mg vial, $159.00 (as of 3 October 2026); BioEdge Research Labs, N-acetyl Semax amidate 10 mg vial, $39.00 (as of 3 October 2026). Prices change often, so check the product page before you rely on one.
How do I know if Semax is real?
Only a lab test can tell you. Ask for the certificate of analysis (COA) for your batch, and confirm it on the testing lab's own site. The mass spectrometry result should match the expected mass of Semax, about 813.9 daltons (C37H51N9O10S). A vendor's COAs for other products say nothing about this one, so check that the certificate names Semax and your lot number.
Who sells the best Semax?
I don't rank vendors, so I don't name a best one. Compare what each lets you check: a named testing lab, a COA for your lot that the lab confirms on its own site, and no FDA warning letter. The table shows my checklist result for each vendor. A vendor that passes every check can still ship a bad batch.
Sources
- Vendor checks: my review of each vendor, on the date shown under the table. Products and prices: each vendor's own product page.
- Legal status, class and evidence: my Semax guide, which cites its sources. Formula, mass and sequence: the structure record shown on that guide, checked against two sources.