Vendor and compound
Semax from Ascend Science
Ascend Science lists Semax at $4.50 per mg, 10% over the $4.10 peer median. 1 third-party certificate for this compound from this vendor is on file, assayed by Kovera Labs and/or ILS Labs, averaging 99.58% purity. The cheapest listed price for Semax anywhere in the index is $1.67 per mg at GenX Peptides.
All Semax vendors · Ascend Science profile · scores 90.1 of 100, rank 2 · 1 certificate for this compound · verified 18 Aug 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $45 | $4.50 | +10% | Semax |
Read from the vendor’s own store and normalised per milligram, because a smaller vial at a lower sticker price is usually the dearer peptide. CodePEPINDEX· 15% off applies at checkout.
What the laboratory found
| Lot | Assayed | Purity | Label → assayed | Laboratory | Record |
|---|---|---|---|---|---|
| AS-XA5-2 | 13 Aug 2026 | 99.58% | 10 mg → 5.77 mg | Kovera Labs and/or ILS Labs | Open |
Other vendors selling Semax
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Next Gen Peptides | 93.8 | $3.50 | 1 |
| Amino Club | 88.3 | $3.00 | 0 |
| Modern Aminos | 88.1 | $4.20 | 2 |
| Origin Labs | 87.7 | — | 1 |
| Bench Grade Peptides | 86.8 | $5.40 | 2 |
| Polaris Peptides | 86.6 | $4.00 | 1 |
| PeptidePlugs | 86.3 | $4.00 | 4 |
| Simple Peptide | 84.9 | $5.50 | 1 |
Ordered by overall evidence score. See every vendor listing Semax.
Questions
Is Semax from Ascend Science third-party tested?
Yes. 1 certificate for Semax from Ascend Science is on file, signed by Kovera Labs and/or ILS Labs. Each names a lot, prints the assayed mass against the labelled mass, and links to the document it was read from.
How much does Semax cost at Ascend Science?
$4.50 per milligram, from 10 mg at $45. The peer median across every vendor we price for Semax is $4.10 per mg, so this is +10% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is Ascend Science a good place to buy Semax?
Ascend Science scores 90.1 of 100 on the published rubric and ranks 2 overall, computed from its documentation rather than from opinion. For Semax specifically it has 1 certificate on file. GenX Peptides lists it cheaper at $1.67 per mg.