Vendor and compound
Semax from Simple Peptide
Simple Peptide lists Semax at $5.50 per mg, 34% over the $4.10 peer median. 1 third-party certificate for this compound from this vendor is on file, assayed by Freedom Diagnostics Testing, averaging 99.11% purity. The cheapest listed price for Semax anywhere in the index is $1.67 per mg at GenX Peptides.
All Semax vendors · Simple Peptide profile · scores 84.9 of 100, rank 10 · 1 certificate for this compound · verified 28 Sept 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $55 | $5.50 | +34% | Semax 10MG |
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.
What the laboratory found
| Lot | Assayed | Purity | Label → assayed | Laboratory | Record |
|---|---|---|---|---|---|
| SEMX10-042026-3 | 15 Apr 2026 | 99.11% | 10 mg → 12.69 mg | Freedom Diagnostics Testing | Open |
Freedom Diagnostics Testing publishes a lookup, so these reports can be confirmed at the laboratory rather than taken from the vendor. How to check one.
Other vendors selling Semax
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Next Gen Peptides | 93.8 | $3.50 | 1 |
| Ascend Science | 90.1 | $4.50 | 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 |
Ordered by overall evidence score. See every vendor listing Semax.
Questions
Is Semax from Simple Peptide third-party tested?
Yes. 1 certificate for Semax from Simple Peptide is on file, signed by Freedom Diagnostics Testing. Each names a lot, prints the assayed mass against the labelled mass, and links to the document it was read from. Freedom Diagnostics Testing also publishes a lookup, so the report can be confirmed at the laboratory rather than taken from the vendor.
How much does Semax cost at Simple Peptide?
$5.50 per milligram, from 10 mg at $55. The peer median across every vendor we price for Semax is $4.10 per mg, so this is +34% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is Simple Peptide a good place to buy Semax?
Simple Peptide scores 84.9 of 100 on the published rubric and ranks 10 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.