What is the difference between Semax and Selank?

They derive from different parent molecules — Semax from ACTH and Selank from tuftsin. Both are research-use-only regulatory peptides. This is a factual comparison only.

Which is cheaper per mg?

Compare the scanned cost per milligram below; it varies by vendor and vial size.

Research comparison

Research use only

Semax vs Selank

Semax and Selank are short regulatory peptides studied as neuromodulation reference compounds in research. They come from different parent molecules. Here is a factual comparison and a per-mg price check.

Lowest cost per mg right now: Semax at $4.25/mg. Prices checked Aug 27, 2026

SemaxPeptideLower $/mg

Semax is a short peptide derived from a fragment of ACTH (adrenocorticotropic hormone), studied as a neuromodulation reference compound.

ClassPeptide

$4.25/mgfrom $29.95 · 3 vendors

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SelankPeptide

Selank is a short peptide derived from the immunopeptide tuftsin, studied as a neuromodulation reference compound.

ClassPeptide

$4.25/mgfrom $29.95 · 3 vendors

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Key differences

Parent molecule: Semax derives from ACTH(4-10); Selank derives from tuftsin.
Both are short synthetic regulatory peptides studied in neuro-research models.
Both are also offered in N-acetyl (stabilized) variants by some vendors.

Semax vs Selank — FAQ

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All comparisons Price index ($/mg)

For laboratory research use only. Not for human or veterinary use, diagnosis, treatment, or consumption.