Peptide Decoding
Semax vial, mock product photograph
Mock-up, not a real vendor product
Price transparency

Semax prices_

also sold as ACTH 4-10

106 vendors list Semax. The most-sold size is 10 mg, typically $29.99 to $79.99 a vial across 55 vendors with an exact in-stock price. The median is $49.00. Last read Oct 11, 2026.

A peptide used for sharper focus, memory, and mental clarity.

Research onlyBrain, mood and sleep153 listings
3.4xbetween the cheap end and the dear end of the Semax market, per milligram.
$4.90is the middle of the pack per mg. Half the listings sit above it, half below.
1listings hide the price behind an account. We record them rather than guess.
Vendors
106
and all publish a price
Listings
153
sizes and sellers
Cheapest
$19.99
sticker price
Typical per mg
$2.50–$8.40
10th to 90th
Gap
3.4x
cheap to dear
Last read
Oct 11, 2026
prices move
01

Top three vendors

Card one is our pick. Every card is labeled.
10 mg is the size most vendors sell, so these cards compare that size only. Of the 57 vendors selling it, we sort by published testing first, then price per mg.

Card one came out on top. We earn nothing from it. Cards two and three are the stores we partner with that sort highest. We earn a commission from them.

Semax vial, illustrative product renderingOur pick

Orbitrex Peptides

orbitrexpeptide.is

The site provides batch-linked external reports and publicly readable purity, including a result above 99%. The parsed report did not clearly establish both HPLC and mass spectrometry.

5 mg10 mg20 mg25 mg30 mg
Price
$3.00per mg
10 mg vial$29.99
Against the median36% below the median
Testing and purity
Batch COA published
Outside lab tested itYes
HPLC for purityUnclear
Mass spec for identityUnclear
Your batch testedYes
Lab namedYes
LaboratoryChromate
Buying
Stockin stock
Site accessAccessible
Catalog71 listings
Last checkedOct 10, 2026
Visit Orbitrex Peptides
Semax vial, illustrative product renderingPartner

Ascend Science

ascend.science

Public COA archive at /coa and /coa-archive, issued per lot rather than per product, covering roughly 73 reports across 36 products. The site names Freedom Diagnostics as its testing laboratory; in…

5 mg10 mg20 mg25 mg30 mg
Price
$4.90per mg
10 mg vial$49.00
Against the median5% above the median
Against our pick1.6x the price
code PEPTIDEDECODING saves 15%
Testing and purity
Batch COA published
Outside lab tested itYes
HPLC for purityYes
Mass spec for identityYes
Your batch testedYes
Lab namedYes
LaboratoryFreedom Diagnostics Testing; ILS Laboratories; Kovera Labs
Buying
Stockin stock
Site accessAccessible
Catalog77 listings
Last checkedOct 10, 2026
Visit Ascend Science
We earn from this link
Semax vial, illustrative product renderingPartner

American Peptides

americanpeptides.us

Lot-matched COA library at /pages/coa, free to download with no account, listing roughly 51 products with lot codes such as RETA10-0803 and TIR20-0528. Also runs a lot-number lookup at /verify that…

5 mg10 mg20 mg25 mg30 mg
Price
$6.50per mg
10 mg vial$65.00
Against the median39% above the median
Against our pick2.2x the price
code ALYSSA108066 saves 10%
Testing and purity
Batch COA published
Outside lab tested itYes
HPLC for purityYes
Mass spec for identityYes
Your batch testedYes
Lab namedUnclear
Buying
Stockin stock
Site accessAccessible
Catalog86 listings
Last checkedOct 10, 2026
Visit American Peptides
We earn from this link

Every figure here is reconstructible from the full table below. Links noted "We earn from this link" carry a sponsored tag; a commission never changes a card's position, and a partner that wins the rule stays in first place. Prices exclude shipping and were read on the dates shown.

02

Every vial, cheapest per milligram first

Vials come in different sizes, so price per mg is the only column that compares like with like. Other forms are listed below it, each in its own section.
Sort by
All sizes5 mg10 mg20 mg25 mg30 mg

We earn from these links. It never changes a price or a position here.

Blends containing this compound

Cheapest first, laid out like the table above. Every listing is a blend that contains Semax, so prices are not comparable with the single-compound table above; per mg uses the total peptide in the vial.

  • 99 Purity Peptides
    Semax 10 mg + Selank 10 mg
    $69.99starting atStarting price, larger sizes cost more
    not statedin stockOct 10, 2026View°code PEPTIDEDECODING saves 10% on single products (kits and bundles excluded)
  • LiveWell Peptides
    Selank 10 mg + Semax 10 mg
    $75.00Size not captured, and this vendor shows the same price on other compounds
    not statedin stockOct 10, 2026View°
  • Xcel Peptides
    Selank 10 + Semax 10
    $79.00$99.00
    20 mgin stockOct 10, 2026View
  • EZ Peptides
    Semax/Selank Blend – 10mg/10mg
    $88.00Size not captured, and this vendor shows the same price on other compounds
    not statedin stockOct 10, 2026View
  • Sigma Compounds
    Semax/Oxytocin (10/5 MG)
    $89.00
    5 mgin stockOct 10, 2026View
  • Sigma Compounds
    Semax 10 mg + Selank 10 mg
    $97.00
    20 mgin stockOct 10, 2026View
  • Sigma Compounds
    Semax/Selank/Oxytocin (10/10/5 MG)
    $139.00
    5 mgin stockOct 10, 2026View
  • Pure Bio Labs
    Selank 5 mg + Semax 5 mg
    $89.99
    10 mgin stockOct 10, 2026View°
  • Axon Peptide
    Semax + Selank (sizes not stated)
    $94.99Size not captured, and this vendor shows the same price on other compounds · Starting price, larger sizes cost more
    not statedin stockOct 10, 2026View

We earn from these links. It never changes a price or a position here.

Capsules and tablets

Priced per bottle. The size shown is what the listing states, usually one capsule or tablet, so a price per milligram would not compare with a vial.

VendorSizePricePer mgAvailabilityCheckedLink
American PeptidesMelts Pro Selank + Semax Dissolving Strips10 mg$174.00—in stockOct 10, 2026View

Sprays

Priced per bottle. The dose is spread through a liquid, so a price per milligram does not compare with a vial of powder.

VendorSizePricePer mgAvailabilityCheckedLink
Kitsune CompoundsSemax Nasal Spray 10mg10 mg$29.99—in stockOct 10, 2026View
Go Alpha Labs PeptidesSemax Liquid SprayNot stated$37.09—in stockOct 11, 2026View
Nextech LabsSemax 10mg Air Dispersal Kit10 mg$50.00—in stockOct 10, 2026View
Crownwell ResearchIntranasal Solution - SemaxNot stated$60.00—in stockOct 10, 2026View
HLX LabsSemax 10mg Nasal10 mg$64.99—in stockOct 10, 2026View
Forto LabsSemax Nasal Spray — 5mg5 mg$66.99—in stockSep 12, 2026View
Xeno PeptidesSemax Nasal SprayNot stated$70.00—in stockOct 10, 2026View
Limitless Life NootropicsSemax SprayNot stated$76.99—out of stockOct 10, 2026View
Sigma CompoundsSemax/Oxytocin (10/5 MG)15 mg$89.00—in stockOct 10, 2026View
American PeptidesSEMAX LIQUID SPRAY10 mg$90.00—in stockOct 10, 2026View
Stemcode PeptidesSemax and Selank Nasal Spray (15mg each)30 mg$99.00—in stockOct 10, 2026View
Real PeptidesSemax Liquid Spray — 45mg45 mg$120.00—in stockOct 10, 2026View

Solutions and liquids

Already mixed and priced per bottle, so not compared per milligram with a vial of powder.

VendorSizePricePer mgAvailabilityCheckedLink
Pure Health PeptidesSemax Liquid50 mg$114.00—in stockSep 28, 2026View
03

Vendor by vendor

What each site was showing when we read it, and how it prices against the rest.
Vendor$1.94/mg
Peptide Pros
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.12/mg
Biotech Peptides
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.19/mg
Alpha Peptides
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.27/mg
Paramount Peptides
2 listings · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.30/mg
Ion Peptide
2 listings · read Oct 10, 2026

Names its testing lab: not named; lot-specific third-party COAs per the store.

Coverage record →
Vendor$2.30/mg
Skye Peptides
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.33/mg
Recon Peptides
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$2.88/mg
Real Peptides
2 listings · read Oct 10, 2026

Names its testing lab: Freedom Diagnostics and Kovera (named on its capsule product pages).

Coverage record →
Vendor$3.12/mg
Offline Peptides
1 listing · read Oct 10, 2026

Names its testing lab: not named; independent US labs, COA with a photo of the tested vial.

Coverage record →
Vendor$3.25/mg
BioLongevity Labs
1 listing · read Oct 10, 2026

Does not name a testing lab on this product's page.

Coverage record →
Vendor$3.40/mg
HLX Labs
2 listings · read Oct 10, 2026

Names its testing lab: not named; COA per lot linked from each product.

Coverage record →
Vendor$3.83/mg
PRPEPS
1 listing · read Oct 10, 2026

Names its testing lab: not named; third-party accredited lab per lot.

Coverage record →
04

Three things price per mg does not tell you

A cheap milligram is only cheap if the vial holds it.
Fill weight

The label is a claim, not a measurement

Every per mg number here divides the price by the milligrams printed on the vial. Testing labs regularly find vials that weigh less than the label says.

Landed cost

Shipping and card fees are not in these numbers

Shipping is often flat, so it hurts small orders most. Several vendors add a card fee and discount for crypto. Two offers a dollar apart can swap places at checkout.

Vial size

Bigger vials look cheaper and go off just as fast

A bigger vial costs less per mg and expires on the same schedule. Once mixed, most people work to about 28 days in the fridge, so the saving only counts if you finish it.

05

How wide the price gap really is

Same compound, same buyers, very different tickets.
3.4x
Cheap end to dear end

Ignoring the few freak listings at each extreme, the dear end of the Semax market costs 3.4 times what the cheap end does, per milligram.

$4.90
Middle of the pack

Half these listings charge more than this per mg and half charge less. It moves with sales, which is why every row carries a date.

106
Vendors carrying it

Enough coverage to show a real range. Anything under three vendors stays off the hub.

A row of Semax research vials, mock product photograph
Same peptide, 106 vendorsNothing on the glass tells you which seller will show you a lab report you can open, or what a milligram actually costs. That is what the table above is for.
06

What you are actually buying

Regulatory status changes what a price means.
Semax vial, mock product photograph
Regulatory status

Research only

Semax is approved and prescribed in Russia. It has never been approved in the United States. Not eligible for compounding under Section 503A: no monograph, not a component of an approved drug, not on the Bulks List. Previously in Category 2; the nomination was withdrawn. An FDA advisory committee recommended inclusion on July 23-24, 2026; that recommendation is non-binding and no rule has taken effect. The use the FDA evaluated: Cerebral ischemia, migraine and trigeminal neuralgia. Evaluation is not approval; if listed, the listed use would define what a pharmacy could compound it for.

Full Semax record →
What that changes

Nobody stands behind a research vial

There is no pharmacist behind it, no dispensing record, and nobody on the hook for what is inside. The lab report is the whole quality system, which is why it sits next to the price here.

Research use only is a claim the seller has to keep making. A vendor that adds dosing instructions, health claims, or personal-use wording has stepped outside the framework it relies on, and that says something about the seller.

What customs and carriers do varies by state and by shipper. This describes how these products are sold and is not legal advice.

07

Before the vial arrives

What actually shows up, and the vial math that decides which size is the better buy.
Semax, mock product photograph
Storage

Frozen dry, refrigerated wet

Freeze-dried powder keeps for a long time in the freezer and for months in the fridge. Once liquid goes in, most people work to about 28 days in the fridge, away from light.

Semax, mock product photograph
Mixing

Bacteriostatic water and insulin syringes are extra

What arrives is powder in a sealed vial. Water goes down the inside wall rather than onto the powder, and the vial is swirled instead of shaken. Neither the water nor the syringes are in the prices above.

Semax, mock product photograph
Vial economics

The bigger vial is only cheaper if you finish it

A larger Semax vial costs less per mg and expires on the same schedule once mixed. The saving is real only when the vial runs out inside that window.

Nothing on this page tells you what to take. Full walkthroughs live in the guides.

08

How this table is built

What decides the order of the rows, and who gets to be in them.
Ordering

Cheapest per mg first, and nothing else

Rows sort on one number. There is no combined score and no weighting, so no vendor can be pushed up the table by a rating you cannot check.

Inclusion

Doing badly does not get a vendor removed

Vendors that publish nothing stay in the table, marked. Taking them out would make the market look tidier than we found it.

Prices

Every price has a date on it

Prices are read off public catalog pages and saved with the date. If a check runs late the row says so instead of showing an old price as current.

Money

Sorting never reads who pays us

Commissioned links are marked on the row and listed on the disclosure page. They never move a listing up or down the table.

How these prices are collected

Prices on this site are read from vendor websites on the dates shown. A starting tag means the vendor publishes only a from price for that product. A wall means the vendor hides prices behind a login, and we publish that fact rather than hide the gap.

We report prices and never rate or score an offer. There is no value grade, no ranking of vendors by our opinion. A row carries its size, its price, its price per milligram, and any plain fact about the listing worth knowing.

When a vendor's site disappears, its rows stay in the tables as a dated record, drop out of every count, price range and ranking, and lose their links. Ninety days after a vendor's site disappears, its rows leave these tables and remain in our records.

Some vendors pay this site a commission when you buy through our links. Every one of those links is marked, and every vendor with that arrangement is labeled on the vendor page. Commissions never change the prices we show, the order of any table, a vendor's badge, or anything in the audit record. The data is collected the same way for every vendor, paid or not.

We accept no payment for coverage, placement, or ratings. Warning letters come from fda.gov. If a paying vendor earns a bad mark, the mark stays.

How this site makes money

09

Questions about buying semax

Cost, sizes, and how this table works.
How much does Semax cost?+

The most-sold size, 10 mg, typically runs $29.99 to $79.99 a vial across 55 vendors, with a median of $49.00. Across 106 vendors it typically runs $2.50 to $8.40 per milligram, with the cheapest sticker price at $19.99. Prices exclude shipping, card fees, and bacteriostatic water.

Why is the same vial so much cheaper at one vendor?+

Vial size, sale cycles, payment method discounts, and how much testing evidence a seller publishes all move the number. A cheap milligram is only cheap if the vial holds what the label claims, which no price column can tell you.

Do you make money if I buy?+

Sorting never reads whether a vendor pays us. Any commissioned link is marked on the row and listed on the disclosure page, and it never changes where a listing lands in the table.

Is semax legal to buy?+

Semax is approved and prescribed in Russia. It has never been approved in the United States. Not eligible for compounding under Section 503A: no monograph, not a component of an approved drug, not on the Bulks List. Previously in Category 2; the nomination was withdrawn. An FDA advisory committee recommended inclusion on July 23-24, 2026; that recommendation is non-binding and no rule has taken effect. The use the FDA evaluated: Cerebral ischemia, migraine and trigeminal neuralgia. Evaluation is not approval; if listed, the listed use would define what a pharmacy could compound it for.

How current are these prices?+

Every price is read off a public catalog page and stored with its date; this compound was last read Oct 11, 2026. Nothing is overwritten, so a stale row says so rather than pretending to be current.

10

Other brain, mood and sleep compounds with price data

Same catalog sweep, same read dates.
BPC-157 research vial, mock product photograph
BPC-157
from $20.00
138 vendors
GHK-Cu research vial, mock product photograph
GHK-Cu
from $14.99
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MOTS-c research vial, mock product photograph
MOTS-c
from $24.95
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TB-500 / Thymosin Beta-4 research vial, mock product photograph
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from $21.57
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