Vendor and compound
Semax from PeptidePlugs
PeptidePlugs lists Semax at $4.00 per mg, 2% under the $4.10 peer median. 4 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.78% purity. The cheapest listed price for Semax anywhere in the index is $1.67 per mg at GenX Peptides.
All Semax vendors · PeptidePlugs profile · scores 86.3 of 100, rank 9 · 4 certificates for this compound · verified 29 Aug 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $40 | $4.00 | -2% | 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 |
|---|---|---|---|---|---|
| 101310L-DK | 13 Aug 2026 | 99.88% | 10 mg → 10.81 mg | Freedom Diagnostics Testing | Open |
| 148-03-DK | 4 Jul 2026 | 99.79% | 10 mg → 12.28 mg | Freedom Diagnostics Testing | Open |
| 122-A-S | 22 Apr 2026 | 99.76% | 10 mg → 10.87 mg | Freedom Diagnostics Testing | Open |
| 2603100107 | 11 Mar 2026 | 99.682% | 10 mg → 11.69 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 |
| Simple Peptide | 84.9 | $5.50 | 1 |
Ordered by overall evidence score. See every vendor listing Semax.
Questions
Is Semax from PeptidePlugs third-party tested?
Yes. 4 certificates for Semax from PeptidePlugs 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 PeptidePlugs?
$4.00 per milligram, from 10 mg at $40. The peer median across every vendor we price for Semax is $4.10 per mg, so this is -2% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is PeptidePlugs a good place to buy Semax?
PeptidePlugs scores 86.3 of 100 on the published rubric and ranks 9 overall, computed from its documentation rather than from opinion. For Semax specifically it has 4 certificates on file. GenX Peptides lists it cheaper at $1.67 per mg.