Semax and Selank at a Glance
Both are supplied as 30mg lyophilised vials, listed with supplier-stated 99%+ purity, and both pair with the intranasal research kit. The table summarises how they compare as research materials.
| Attribute | Semax | Selank |
|---|---|---|
| Derived from | An ACTH peptide fragment | The peptide tuftsin |
| Research class | Nootropic research peptide | Anxiolytic nootropic research peptide |
| Supplied as | 30mg lyophilised vial | 30mg lyophilised vial |
| Stated purity | 99%+ | 99%+ |
| Intranasal kit | Available | Available |
Everything on this page describes the handling and properties of a research compound in a laboratory context only. It is not guidance for human or animal use. Products supplied by North Peptides UK are for research use only and are not for human or animal consumption.
What Each One Is
Semax is a synthetic peptide based on a short fragment of the ACTH (adrenocorticotropic hormone) sequence. In research literature it is described as a nootropic peptide and is studied in cognition and neuroprotection research models.
Selank is a synthetic peptide based on the immunopeptide tuftsin. It is described in research literature as an anxiolytic nootropic peptide and is studied in research models relating to anxiety-like behaviour and neuropeptide signalling.
Both are supplied purely as reference research compounds. North Peptides UK makes no claims about effects in humans, and nothing here is guidance for human or animal use.
The Core Difference
The main distinction is their origin and research focus. Semax derives from an ACTH fragment and is most associated with cognition and neuroprotection research; Selank derives from tuftsin and is most associated with anxiety-related and immunomodulation research. Some research programmes hold both to compare the two peptide families side by side.
Intranasal Research Preparation
Both compounds are commonly prepared for intranasal research workflows. North Peptides UK offers an intranasal research kit — a 10ml nasal spray bottle with sterile saline, a transfer syringe and adaptor, wipes and a label — designed for use alongside compatible research compounds such as these.
Handling and Reconstitution
Both reconstitute the same way, in bacteriostatic water (or sterile saline where an intranasal preparation calls for it). Add the solvent down the side of the vial, swirl gently, and refrigerate the prepared solution. Our reconstitution guide covers the full procedure.
Sourcing in the UK
Both Semax and Selank are UK stocked and dispatched within 24–48 hours of confirmed payment on business days, listed with supplier-stated 99%+ purity with supplier documentation available on request where held. For questions before ordering, reach the team directly on Telegram at @NORTHPEPTIDESUK.
Frequently Asked Questions
What is the difference between Semax and Selank?
They derive from different parent molecules: Semax from an ACTH peptide fragment, Selank from tuftsin. Both are nootropic research peptides; Selank is additionally described as an anxiolytic peptide in research literature.
How are Semax and Selank supplied?
Both as 30mg lyophilised vials, listed with supplier-stated 99%+ purity and stored frozen until dispatch, with supplier documentation available on request where held.
Can Semax or Selank be used in humans?
No. Both are supplied strictly for laboratory and scientific research and are not for human or animal consumption.