Research catalog comparison
Semax vs Selank
Semax and Selank are often grouped in search results because both appear in neurobiological research contexts. They remain different peptide sequences with separate study histories, so the useful comparison is identity, evidence, form, and like-for-like catalog pricing—not assumed equivalence.
Live catalog snapshot
In-stock listings only
Semax
- Lowest list price
- $21.99
- 5mg
- Suppliers
- 51
- Active offers
- 75
- Listed quantities
- 15
Selank
- Lowest list price
- $25.00
- 10mg
- Suppliers
- 56
- Active offers
- 82
- Listed quantities
- 18
Lowest list prices can represent different quantities or forms and are not a direct unit-price comparison. The detailed pages show shipping, coupons, package details, and matching quantity options.
Key differences at a glance
| Comparison | Semax | Selank |
|---|---|---|
| Research identity | A synthetic ACTH-fragment analog with its own research literature. | A synthetic tuftsin-derived peptide with a separate research literature. |
| Listing review | Check the labeled form and quantity before comparing supplier prices. | Check the labeled form and quantity before comparing supplier prices. |
| Evidence caution | Findings for Semax should not be attributed to Selank. | Findings for Selank should not be attributed to Semax. |
Research summary starting points
Semax
Semax is a synthetic heptapeptide analog of adrenocorticotropic hormone (ACTH), specifically derived from the ACTH(4-10) fragment, with the amino acid sequence Met-Glu-His-Phe-Pro-Gly-Pro. Developed in Russia, it exhibits pronounced nootropic, neuroprotective, and neurotrophic properties without hormonal activity. The peptide works through multiple mechanisms including modulation of brain-derived neurotrophic factor (BDNF) expression, enhancement of dopamine and serotonin levels, melanocortin receptor interaction, and anti-inflammatory effects. Research demonstrates efficacy in treating acute ischemic stroke, cognitive impairment, optic nerve diseases, and peptic ulcers. Clinical trials in Russia have shown improvements in neurological recovery, memory, attention, and neuroprotection. Semax is approved and marketed as a prescription medication in Russia and Eastern Europe, where it has been in clinical use since the 1990s. However, it has not been evaluated or approved by regulatory agencies in the United States, European Union, United Kingdom, or most other countries, where it is sold only as a research chemical.
Read the sourced Semax overview →Selank
Selank is a synthetic heptapeptide anxiolytic and nootropic drug developed by the Institute of Molecular Genetics of the Russian Academy of Sciences. It is a synthetic analog of the immunomodulatory peptide tuftsin, consisting of the tuftsin sequence (Thr-Lys-Pro-Arg) elongated at the C-terminus with Pro-Gly-Pro for enhanced metabolic stability. Selank exhibits pronounced anxiolytic, nootropic, neuroprotective, and immunomodulatory activities through modulation of GABAergic, serotonergic, and dopaminergic neurotransmitter systems, along with regulation of brain-derived neurotrophic factor (BDNF) expression.
Read the sourced Selank overview →Common comparison questions
Are Semax and Selank the same compound?
No. Semax and Selank are distinct compounds. Compare their identities and evidence separately.
What is the lowest listed Semax price?
The lowest currently indexed in-stock Semax listing starts at $21.99 for 5mg. Compare matching quantities because package size and form affect price.
What is the lowest listed Selank price?
The lowest currently indexed in-stock Selank listing starts at $25.00 for 10mg. Compare matching quantities because package size and form affect price.
Comparison scope
Peptide Plus compares research-supplier catalog data. This page does not provide medical advice, dosing guidance, or a claim that either compound is appropriate for human use. All listed products are for research purposes only.