Vendor and compound
Semax from Modern Aminos
Modern Aminos lists Semax at $4.20 per mg, 5% over the $4.00 peer median. 2 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.62% purity. The cheapest listed price for Semax anywhere in the index is $1.67 per mg at GenX Peptides.
All Semax vendors · Modern Aminos profile · scores 79.7 of 100, rank 6 · 2 certificates for this compound · verified 5 Nov 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $42 | $4.20 | +5% | NA-Semax (N-Acetyl 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.
What the laboratory found
| Lot | Assayed | Purity | Label → assayed | Laboratory | Record |
|---|---|---|---|---|---|
| BX-P-U3M0 | 16 Jul 2026 | 99.57% | 20 mg → 11.83 mg | Freedom Diagnostics Testing | Open |
| BX-P-K5T1 | 15 Jun 2026 | 99.67% | 10 mg → 12.41 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 |
|---|---|---|---|
| Origin Labs | 89.1 | $2.40 | 1 |
| Next Gen Peptides | 87.7 | $3.50 | 3 |
| ZC Labs | 87.2 | $2.00 | 1 |
| Amino Club | 86.1 | $3.00 | 0 |
| PeptidePlugs | 82.6 | $4.00 | 1 |
| Bench Grade Peptides | 79.4 | $5.40 | 2 |
| Stealth Research Labs | 78.1 | $4.00 | 1 |
| One Aminos | 78 | $3.50 | 1 |
Ordered by overall evidence score. See every vendor listing Semax.
Questions
Is Semax from Modern Aminos third-party tested?
Yes. 2 certificates for Semax from Modern Aminos are 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 Modern Aminos?
$4.20 per milligram, from 10 mg at $42. The peer median across every vendor we price for Semax is $4.00 per mg, so this is +5% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is Modern Aminos a good place to buy Semax?
Modern Aminos scores 79.7 of 100 on the published rubric and ranks 6 overall, computed from its documentation rather than from opinion. For Semax specifically it has 2 certificates on file. GenX Peptides lists it cheaper at $1.67 per mg.