The semax price on the listing we point lifters to is $59.99 for a 10 mg vial, or $30.00 once the code PEPTIDEDECK is applied, which works out to $3.00 per milligram. That last figure is the one worth carrying into any comparison, because vial sizes differ across suppliers and a sticker price on its own tells you almost nothing.
Key takeaways
- One 10 mg vial: $59.99 list, $30.00 with the code, $3.00 per milligram. Convert every competing listing to a per-milligram figure before you compare anything, because vial sizes are not standard in this market.
- The 3, 5 and 10 unit tiers take 3%, 5% and 10% off the list price. Ten vials bought on the tier alone still cost $5.40 per milligram, which is well above one vial bought with the code.
- The certificate for batch 30-05260628 reports 11.23 mg of net content against a 10 mg label. On that lot the real figure is closer to $2.67 per milligram of assayed material.
- Price and testing scope move together. Endotoxin and sterility work costs a supplier real money to run, and a certificate that skips both is the cheapest kind to produce.
- A $30.00 vial costs less than the hour it takes to read the evidence properly, and the evidence for Semax in a training population is thin, largely Russian-language, and routinely quoted at second hand.
The vendor we point lifters to
Semax from Ascension Peptides
Independently assayed material, dispatched from the US. The vial drops by half with the code below.
The published certificate for batch 30-05260628 carries a kinetic chromogenic LAL endotoxin test to USP Chapter 85, reporting under 0.20 EU/mL against a 0.5 EU/mL limit, plus a sterility screen. Buying 3, 5 or 10 takes 3%, 5% or 10% off the list price.
- Two independent lab reports per batch
- Free delivery above $250
- Same-day dispatch on orders before 2pm CST
Research material, laboratory use only, not for human consumption. Affiliate links: we may earn a commission at no extra cost to you. Pricing verified August 21, 2026.
The semax price on one listing, in four numbers
There is a single Semax SKU on this store, so there is no tier ladder to decode and no premium version sitting next to a standard one. The whole picture fits in a short table.
| What you are looking at | Figure |
|---|---|
| List price, 10 mg vial | $59.99 |
| With code PEPTIDEDECK | $30.00 |
| Per milligram, label basis | $3.00 |
| Per milligram, assayed basis on batch 30-05260628 | $2.67 |
The fourth line needs explaining, because it is the one nobody else will show you. The certificate for this batch reports net content of 11.23 mg against a labelled 10 mg. Divide $30.00 by 11.23 and you get $2.67 per milligram of material that was actually weighed.
Treat that as evidence about the supplier rather than as a price you can plan around. It is one lot. The next lot may fill closer to the label, and a supplier is under no obligation to overfill. Compare on the $3.00 label figure, and read the overfill as a small signal that the fill process is not being run to the edge.
What the quantity tiers actually do
The tiers and the code are separate mechanisms, and they are not close in magnitude.
| Quantity | Discount off list | Effective per-mg |
|---|---|---|
| 1 vial, list | none | $6.00 |
| 3 vials | 3% | $5.82 |
| 5 vials | 5% | $5.70 |
| 10 vials | 10% | $5.40 |
| 1 vial, code applied | 50% | $3.00 |
Ten vials bought on the tier alone land at $5.40 per milligram. One vial bought with the code lands at $3.00. The tier is not a serious lever next to a straight halving, and buying nine vials you did not need in order to save 10% off list is the worst arithmetic on this page.
Whether the code and the tiers combine is not documented anywhere on the store. We have not seen it stated, so do not build a cart around the assumption that they stack. Enter the code, look at the recalculated total, and decide from the number the checkout actually shows you.
Free shipping starts at $250, which one vial does not reach. If shipping matters to your total, price it in rather than assuming it away.
Why you cannot compare this to a nasal spray price
A large share of the Semax sold to consumers is a nasal spray, and the moment you try to line a spray up against a vial the comparison falls apart. A vial is sold by mass. A spray is sold by volume, usually with a percentage concentration on the label and no total peptide content stated anywhere.
Without a milligram figure there is no shared unit. A 30 mL bottle at some concentration and a 10 mg vial are not two prices for the same thing, and a listing that will not tell you how much peptide is in the bottle has quietly answered a different question than the one you asked. If the price of a spray looks better, check first whether the listing states total content. Usually it does not.
This is the same problem readers hit comparing formats across other compounds, and we worked through it in detail on buying NAD+ as an injection, where the format changes what the number on the page even refers to.
What the extra testing on this certificate costs
Here is the part of the price that most buyers never see. Testing is not one thing, and the tests are not priced alike.
Purity by HPLC and identity by mass spectrometry are routine. Any supplier running a serious quality programme has them, and they are the cheap end of the bill. Bacterial endotoxin testing and a sterility screen are a different order of expense: separate assays, separate reagents, separate turnaround, run by a lab equipped for microbiology rather than chromatography alone.
The Semax certificate for batch 30-05260628, issued by Kovera Labs in June 2026, runs the expensive ones. It reports purity at 99.886% against a greater than 98% specification, identity confirmed by LC-MS, a bacterial endotoxin result below 0.20 EU/mL against a 0.5 EU/mL acceptance limit by kinetic chromogenic LAL to USP Chapter 85, a rapid sterility screen returning no growth, and elemental impurities by ICP-MS with lead, arsenic, cadmium and mercury all under their acceptance limits.
Be precise about what the sterility line is. The document calls it a rapid sterility screen, a two-day incubation at 30 to 35 degrees Celsius, and it says in its own words that full USP Chapter 71 sterility testing may be required for regulatory compliance. That is a screen, not a compendial sterility release. It is still more than most certificates in this market carry.
Why this matters to price: a supplier who runs endotoxin and sterility work on every batch has a higher cost base than one who runs purity alone. When a competing listing is dramatically cheaper per milligram, the testing scope is one of the first places that saving tends to come from. Weighting testing above price is the same logic we used in our NAD+ source ranking.
Why the endotoxin line is the one that earns its cost
FDA's stated concern with this compound is specific, and it is a testing question rather than a matter of opinion. On its safety-risks page for nominated bulk drug substances the agency writes that compounded drugs containing semax (heptapeptide) "may pose risk for immunogenicity for certain routes of administration due to the potential for aggregation and peptide-related impurities", that it has no, or limited, safety-related information for proposed routes of administration, and that it therefore lacks sufficient information to know whether the drug would cause harm if administered to humans.
Aggregation and impurities are exactly what purity, identity, endotoxin and sterility testing are built to characterise. So a certificate that carries those lines is answering the question the regulator actually raised, which is a rarer thing than it sounds. That scope belongs to the batch rather than to the product. This vendor's earlier Semax certificate, from MZ Biolabs for lot 30-01260229 analysed in February 2026, covers purity, quantity and identity and carries no endotoxin and no sterility result at all. Same product, same store, four months apart, two documentation standards. Read every certificate posted on the product page rather than only the one that happens to be a clickable link.
None of that converts a clean result on one batch into a safety guarantee. FDA is saying it lacks human data. A lab report cannot supply human data. What the report does is close off one category of avoidable problem, which is worth paying for and is not the same as evidence that the compound works.
What $30.00 buys a lifter, honestly
At $30.00 the vial costs less than a month of creatine, and that is the trap. A low price removes the friction that would normally make somebody read first, which is precisely when people skip the reading.
Semax is a synthetic heptapeptide, seven residues, Met-Glu-His-Phe-Pro-Gly-Pro. It is the ACTH(4-7) fragment with a proline-glycine-proline tail added to slow enzymatic breakdown, registered on PubChem as CID 9811102 with formula C37H51N9O10S and a molecular weight of 813.9. It was developed in Russia and carries a Russian registration covering cognitive and stroke indications. That registration is real, it is not an FDA approval, and the two are not interchangeable as evidence.
Run a PubMed search for semax and the returns are dominated by rodent work and small Russian-language clinical reports. That is a genuine preclinical literature. It is not a controlled trial in lifters, and no honest page should present it as one.
The reason people land here is usually real. Motivation flattens in week six of a hard block, focus goes before strength does, and adherence quietly falls apart before performance does. Those are measurable and modifiable. The levers with actual human evidence behind them are load management, sleep and energy availability, ground this site covers in sleep, cortisol and myostatin. A $30.00 vial does not compete with fixing sleep, and the price is not an argument.
Reconstitution and unit arithmetic are not our territory. Peptide Dosage handles it at the Semax dosage page, with the conversion tool at the Semax calculator.
Frequently asked questions
How much does semax cost per vial?
A 10 mg vial lists at $59.99 and drops to $30.00 with the code PEPTIDEDECK, which is $3.00 per milligram. Other suppliers set their own prices and sell different vial sizes and formats, so convert everything to a per-milligram figure before comparing.
Does the 11.23 mg net content mean I am paying $2.67 per milligram?
On that lot, yes. The certificate for batch 30-05260628 reports 11.23 mg measured against a 10 mg label, which puts $30.00 at $2.67 per milligram of assayed material. It is a single-lot result and not a promise about future batches, so compare on the $3.00 label figure and read the overfill as evidence about the supplier.
Do the 3, 5 and 10 unit discounts stack with the coupon code?
That is not documented anywhere on the store, so do not assume it. The tiers take 3%, 5% and 10% off the list price while the code takes 50%. Build the cart both ways and compare the recalculated totals before paying.
Why is semax cheaper than most peptides on the same store?
Mostly synthesis scale and sequence length. Semax is seven residues, which is short and comparatively cheap to make, whereas longer sequences cost more per milligram to produce. A short peptide being inexpensive is normal and is not by itself a warning sign.
Is a much cheaper semax price a warning sign?
It can be, and testing scope is the usual explanation. Purity and identity testing are the cheap assays. Endotoxin and sterility work costs considerably more to run, so a certificate covering only the cheap tests is the easiest place for a low price to come from.
Will insurance cover any of the semax cost?
No. There is no FDA-approved Semax product to bill against and no US prescription route to it, so research suppliers sell laboratory-labelled material as a straightforward retail purchase. Every figure in this market is out of pocket.
This article is for educational purposes only and is not medical advice. Semax is not an FDA-approved medicine, has no US prescription route, and material sold by research suppliers is labelled for laboratory use only and not for human consumption. Regulatory status and vendor pricing both change; check the current documents rather than relying on a dated summary. Speak with a qualified healthcare professional before making any decision involving peptides, injections or unapproved compounds.