Vendor and compound
Semax from PeptidePlugs
PeptidePlugs lists Semax at $4.00 per mg, level with the peer median. 1 third-party certificate for this compound from this vendor is on file, assayed by Freedom Diagnostics Testing, averaging 99.79% 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 82.6 of 100, rank 5 · 1 certificate for this compound · verified 5 Nov 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $40 | $4.00 | 0% | 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 |
|---|---|---|---|---|---|
| 148-03-DK | 4 Jul 2026 | 99.79% | 10 mg → 12.28 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 |
| Modern Aminos | 79.7 | $4.20 | 2 |
| 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 PeptidePlugs third-party tested?
Yes. 1 certificate for Semax from PeptidePlugs 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 PeptidePlugs?
$4.00 per milligram, from 10 mg at $40. The peer median across every vendor we price for Semax is $4.00 per mg, so this is 0% 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 82.6 of 100 on the published rubric and ranks 5 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.