Whatever a given seller's vial contains, every peptide named in the composition claim above is sold as a research chemical without FDA approval for human use. A name on a label does not change the regulatory status of what is inside it. See the legal status section below.

Research peptides

Neuroxelin: What Sellers Claim Is In It, Unverified

Neuroxelin dosage: what sellers claim this cognitive peptide blend contains - a composition this page could not verify from a second source.

Written bySebastian Hunter, Founder and EditorI'm a 42-year-old senior advisor and distance runner who came to peptides as a sceptic. I'm not a doctor: I read the research, run my own experiment and keep honest notes. Read full bio

Published September 28, 2026

The short version

"Neuroxelin" is a seller name for a cognitive research-peptide blend, not a standardized product. The composition claimed for it is PE-22-28, Pinealon, N-acetyl Semax and N-acetyl Selank in a single vial. I could not verify that claim from a second source: no second independent site names this exact product and its contents. This page reports the claim, not a verified composition, and carries no dosing table because the composition is not confirmed.

The claimed "Neuroxelin" composition could not be verified from a second, independent source.
A product name on a label is not a standardized formula, and what is inside can vary by seller.
No dosing table is given here, because a dose only means something for a confirmed composition.
Each individually named component - PE-22-28, Pinealon, Semax, Selank - has its own dosage page with real sourcing.

“Neuroxelin” is a seller-facing name for a pre-mixed cognitive research-peptide blend. It is not a molecule, and no regulator or lab consortium has standardized the name. I searched for independently fetched sources saying what it contains, and could not verify the claimed composition from a second source. This page states the claim and what could and could not be confirmed. It carries no dosing table, because a units chart for an unconfirmed formula would present a guess as settled fact.

US legal status - Research use only

Every peptide named in the composition claim below is sold as a research chemical, with no FDA-approved product for human use, regardless of what name a seller packages it under.

What sellers claim is in it

The composition claimed for Neuroxelin is four peptides in one vial. PE-22-28 is an anti-excitotoxic fragment, and Pinealon is a nootropic tripeptide. The other two are acetylated forms of established research peptides, Semax and Selank. I could not verify that composition from a second source. I searched for independently published sources naming a “Neuroxelin” product and its contents. Every result was either a differently named cognitive-peptide blend or an unrelated product with a similar-sounding name.

The closest verifiable match is a blend sold under a different name. The vendor 24peptides lists an IllumiNeuro blend of PE-22-28 10 mg, Pinealon 10 mg, N-acetyl Semax 20 mg and N-acetyl Selank 8 mg, 48 mg in total. Peptide Database’s IllumiNeuro page gives the same formula. Neither names Neuroxelin, so whether any vial labelled Neuroxelin matches that formula is unknown.

A product name on a label is not a standardized formula. Different sellers can use one name for different mixtures, and only a specific seller’s own label and certificate of analysis say what a specific vial is claimed to contain.

Why sellers describe combining these four

Sources describing this formula frame the four components as covering different, complementary angles of cognitive research interest. Peptide Database’s IllumiNeuro page describes PE-22-28 as neuritogenic, Pinealon as a pineal bioregulator, N-acetyl Semax as neuroprotective and cognitive, and N-acetyl Selank as anxiolytic. That is a rationale for why such a blend might be assembled. It is not a finding from any study of the four peptides combined, and I could not locate such a study under this name or any other.

What this page cannot tell you

No confirmed composition. An unverified claim is not confirmation. A vial labeled “Neuroxelin” from one seller is not guaranteed to match a vial labeled “Neuroxelin” from another.
No dose. Without a confirmed composition, a milligram or unit dose for “Neuroxelin” as a product would be a number attached to nothing verifiable.
No combination study. I could not locate a published human or animal study of PE-22-28, Pinealon, N-acetyl Semax and N-acetyl Selank given together, under this name or any other.

Component side effects and dosing

Each peptide in the claimed composition has its own page built from real sourcing: PE-22-28, Pinealon, Semax and Selank. They cover the published data on side effects and dosing for each compound alone. None of that data applies to a four-peptide mixture, and none of the four has been studied in that combination.

Is Neuroxelin legal?

Whatever a specific seller’s vial contains, every peptide named in the composition claim above is sold as a research chemical with no FDA-approved product for human use. That covers PE-22-28, Pinealon, Semax and Selank. Packaging several research chemicals together under one seller-chosen name does not change their individual regulatory status. See each compound’s own page for jurisdiction-specific detail: PE-22-28, Pinealon, Semax and Selank.

For where research-labelled peptides are sourced, see this site’s research-access page, which sends readers to a specific research-peptide supplier and discloses that relationship on that page.

Common questions

What is Neuroxelin?

"Neuroxelin" is a seller-facing name for a pre-mixed vial of cognitive research peptides. It is not a molecule with a fixed structure, and no regulator recognizes the name. It works like a private-label product name, so two vials sold under it are not guaranteed to contain the same thing.

What does Neuroxelin contain?

The composition claimed for Neuroxelin is PE-22-28, Pinealon, N-acetyl Semax and N-acetyl Selank in one vial. I could not verify that claim from a second source, because no second, independent site names this exact product and its contents. It is reported as a claim, not a confirmed fact. The same four peptides at 10 mg, 10 mg, 20 mg and 8 mg (48 mg total) are sold under a different name, IllumiNeuro. Whether any vial labelled Neuroxelin matches that formula is unknown.

Why isn't there a dosing chart on this page?

A dosing chart converts a dose into syringe units for a specific vial content, and that only means something once the vial's actual content is confirmed. No second source confirms what "Neuroxelin" contains, so a units chart here would present an unverified formula as settled. If you have a specific labeled vial, use the individual compound pages and the dosage calculator instead.

Where can I get a verified dose for the peptides it claims to contain?

Each named component has its own dosage page built from real sourcing: PE-22-28, Pinealon, N-acetyl Semax and N-acetyl Selank. Those pages cover what is known about each peptide alone. None of the four has been tested in combination as "Neuroxelin," under any name.

References (3 sources)

Bibliographic detail is fetched from PubMed, not written by me - so a citation here cannot drift from the paper it names. Study design comes from PubMed's own tags rather than my judgement.

1.America's Poison Centers - confirms 1-800-222-1222 as the national Poison Control number, free and confidential, 24 hours a day.- America's Poison Centersother
2.24peptides- 24peptides.comother
3.Peptide Database’s IllumiNeuro page- peptide-db.comother