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

N-Acetyl Semax_

also sold as NA Semax, Acetyl Semax, N-acetyl semax peptide

Semax with one stabilising tweak, sitting between plain Semax and the amidate version.

Research onlyBrain, mood and sleep12 listings
3xbetween the cheap end and the dear end of the N-Acetyl Semax market, per milligram.
$2.83is the middle of the pack per mg. Half the listings sit above it, half below.
2listings hide the price behind an account. We record them rather than guess.
Vendors
8
7 of them publish a price
Listings
12
sizes and sellers
Cheapest
$42.00
sticker price
Typical per mg
$2.28–$6.90
10th to 90th
Gap
3x
cheap to dear
Last read
Sep 12, 2026
prices move
01

Top three vendors

Each card says which it is. This is not a ranked top three.
The rule: at 25 mg — the size most vendors sell — highest published testing evidence first, then cheapest per milligram. 3 vendors qualify. Same rule for every card.

No partner sells N-Acetyl Semax at 25 mg, so these are the rule winner and the next two sellers under the same rule, all unpaid.

N-Acetyl Semax vial, illustrative product renderingOur pick

Biotech Peptides

biotechpeptides.com

The site describes mass-spectrometry work by its own analytical lab and U.S. manufacture. In-house testing does not satisfy the independent third-party requirement.

10 mg25 mg30 mg
Price
$2.28per mg
25 mg vial$57.00
Against the median5% below the median
Testing and purity
Nothing verified publicly
Outside lab tested itNo
HPLC for purityUnclear
Mass spec for identityYes
Your batch testedUnclear
Lab namedYes
LaboratoryIn-house analytical lab
Buying
Stockin stock
Site accessAccessible
Catalog159 listings
Last checkedSep 12, 2026
Visit Biotech Peptides
N-Acetyl Semax vial, illustrative product renderingRunner-up

Core Peptides

corepeptides.com
10 mg25 mg30 mg
Price
$2.40per mg
25 mg vial$60.00
Against the medianat the median
Against our pick1.1x the price
Testing and purity
Not audited yet
Outside lab tested itUnclear
HPLC for purityUnclear
Mass spec for identityUnclear
Your batch testedUnclear
Lab namedUnclear
Buying
Stocklisted
Site accessUnclear
Catalog122 listings
Last checkedAug 22, 2026
Visit Core Peptides
N-Acetyl Semax vial, illustrative product renderingRunner-up

Core Peptides Research

corepeptidesresearch.com
10 mg25 mg30 mg
Price
$2.40per mg
25 mg vial$60.00
Against the medianat the median
Against our pick1.1x the price
Testing and purity
Not audited yet
Outside lab tested itUnclear
HPLC for purityUnclear
Mass spec for identityUnclear
Your batch testedUnclear
Lab namedUnclear
Buying
Stockin stock
Site accessUnclear
Catalog102 listings
Last checkedSep 12, 2026
Visit Core Peptides Research

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 offer, cheapest per milligram first

Vials come in different sizes, so price per mg is the only column that compares like with like.
Sort by
  • Biotech Peptides
    N-Acetyl Semax (25mg) - BiotechPeptides
    $57.00
    25 mg$2.28 / mgin stockSep 12, 2026View
  • Core Peptides
    N-Acetyl Semax
    $60.00
    25 mg$2.40 / mglistedAug 22, 2026View
  • Core Peptides Research
    N-Acetyl Semax (25mg)
    $60.00
    25 mg$2.40 / mgin stockSep 12, 2026View
  • Liberty Peptides
    N-Acetyl Semax 30mg
    $85.00
    30 mg$2.83 / mgin stockAug 24, 2026View
  • Modern Aminos
    NA-Semax (N-Acetyl Semax)
    $42.00
    10 mg$4.20 / mgin stockSep 12, 2026View
  • Modern Aminos
    NA-Semax (N-Acetyl Semax)
    $42.00Size not stated by the vendor
    not statedin stockSep 12, 2026View
  • True Peptide
    N-Acetyl Semax
    $69.00
    10 mg$6.90 / mglistedAug 23, 2026View°
  • Xcel Peptides
    N-Acetyl Semax Amidate
    $69.00$95.00
    not statedin stockAug 25, 2026View
  • Limitless Life Nootropics
    N-Acetyl Semax
    members onlySize not stated by the vendor
    not statedlogin requiredAug 22, 2026View°
  • Limitless Life Nootropics
    N-Acetyl Semax Spray
    members onlySize not stated by the vendor
    not statedlogin requiredAug 22, 2026View°

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

Blends containing this compound

Grouped by formula, cheapest formula first. Every listing is a blend that contains N-Acetyl Semax, so prices are not comparable with the single-compound table above.

  • NA SEMAX 10 mg + NA SELANK 10 mg1 listing · from $78.00
  • Modern Aminos
    NA SEMAX 10 mg + NA SELANK 10 mg
    $78.00
    20 mgin stockSep 12, 2026View
  • NA-Semax/NA-Selank Research Blend1 listing · from $78.00
  • Modern Aminos
    NA-Semax/NA-Selank Research Blend
    $78.00
    10 mgin stockSep 12, 2026View
03

Vendor by vendor

What each site was showing when we read it, and how it prices against the rest.
Vendor$2.28/mg
Biotech Peptides
1 listing · read Sep 12, 2026

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

Coverage record →
Vendor$2.40/mg
Core Peptides
1 listing · read Aug 22, 2026

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

Coverage record →
Vendor$2.40/mg
Core Peptides Research
1 listing · read Sep 12, 2026

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

Coverage record →
Vendor$2.83/mg
Liberty Peptides
1 listing · read Aug 24, 2026

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

Coverage record →
Vendor$4.20/mg
Modern Aminos
4 listings · read Sep 12, 2026

Names its testing lab: Freedom Diagnostics.

Coverage record →
Vendor$6.90/mg
True Peptide
1 listing · read Aug 23, 2026

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

Coverage record →
VendorPrice behind a wall
Limitless Life Nootropics
2 listings · read Aug 22, 2026

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

Coverage record →
Vendor$69.00 listed
Xcel Peptides
1 listing · read Aug 25, 2026

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

FDA warning letter 694608, December 10 2024
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.
3x
Cheap end to dear end

Ignoring the few freak listings at each extreme, the dear end of the N-Acetyl Semax market costs 3 times what the cheap end does, per milligram.

$2.83
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.

8
Vendors carrying it

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

A row of N-Acetyl Semax research vials, mock product photograph
Same peptide, 8 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.
N-Acetyl Semax vial, mock product photograph
Regulatory status

Research only

Vendors on this page sell N-Acetyl Semax labelled for laboratory research only. That label is the legal reason they are allowed to sell it at all.

Full N-Acetyl 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 maths that decides which size is the better buy.
N-Acetyl 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.

N-Acetyl 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.

N-Acetyl Semax, mock product photograph
Vial economics

The bigger vial is only cheaper if you finish it

A larger N-Acetyl 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 n-acetyl semax

Cost, sizes, and how this table works.
How much does n-acetyl semax cost?+

Across 7 vendors it typically runs $2.28 to $6.90 per milligram, with the cheapest sticker price at $42.00. 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 n-acetyl semax legal to buy?+

N-Acetyl Semax is sold labelled for laboratory research only. That label is the legal basis vendors rely on, and it means nobody stands behind the vial the way a pharmacy would.

How current are these prices?+

Every price is read off a public catalog page and stored with its date; this compound was last read Sep 12, 2026. Nothing is overwritten, so a stale row says so rather than pretending to be current.

10

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