cognitive
Semax
Nootropic ACTH fragment
Cheapest offer
$2.52/mg
18 vendors tracked24 live pricesLast crawl: 2026-09-09 06:02 UTC
About
A synthetic heptapeptide based on an ACTH(4-10) fragment. Studied in Russian neurology for neuroprotection and cognitive enhancement.
Also known as: ACTH(4-7) PGP
Reconstitution calculator
!
For research purposes only. Not for human consumption. Always verify calculations independently.
Cost-per-dose recalculates as you adjust the calculator above.
Semax · 5mg
2 vendors
Operational
$19.43
$3.89/mg· $0.97/dose
In stock◎ Best $/mg
B-
Watch$39.99
$8.00/mg· $2.00/dose
In stock▲ 105.8% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| Research Peptides Europe EU | A | Operational | $19.43 ◎ Best $/mg | $3.89 | $0.97 | In stock | Buy with code → | |
| Modified Aminos US | B- | Watch | $39.99 ▲ 105.8% | $8.00 | $2.00 | In stock | Visit → |
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Last crawl 2026-09-09Sort:
2026-09-09Semax · 10mg
15 vendors
B-
Operational$26.00
$2.60/mg· $0.65/dose
In stockOn sale
Operational
$28.79
$2.88/mg· $0.72/dose
In stockOn sale▲ 10.7% vs best
B
Operational$29.99
$3.00/mg· $0.75/dose
In stock▲ 15.3% vs best
Operational
$32.39
$3.24/mg· $0.81/dose
In stock▲ 24.6% vs best
B-
Operational$33.00
$3.30/mg· $0.82/dose
In stockOn sale▲ 26.9% vs best
Watch
$34.99
$3.50/mg· $0.87/dose
In stockOn sale▲ 34.6% vs best
B-
Operational$35.00
$3.50/mg· $0.88/dose
In stock▲ 34.6% vs best
B-
Operational$35.00
$3.50/mg· $0.88/dose
In stock▲ 34.6% vs best
Watch
$35.00
$3.50/mg· $0.88/dose
In stock▲ 34.6% vs best
Operational
$37.99
$3.80/mg· $0.95/dose
In stock▲ 46.1% vs best
Operational
$39.99
$4.00/mg· $1.00/dose
In stock▲ 53.8% vs best
Operational
$39.99
$4.00/mg· $1.00/dose
In stock▲ 53.8% vs best
Operational
$40.99
$4.10/mg· $1.02/dose
In stock▲ 57.7% vs best
B-
Operational$45.00
$4.50/mg· $1.13/dose
In stock▲ 73.1% vs best
Operational
$47.50
$4.75/mg· $1.19/dose
In stockOn sale▲ 82.7% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| RetaOneLabs US | B- | Operational | $26.00 On sale | $2.60 | $0.65 | In stock | Buy with code → | |
| Double R Labs US | B | Operational | $28.79 On sale ▲ 10.7% | $2.88 | $0.72 | In stock | Visit → | |
| Welli Labs US | B | Operational | $29.99 ▲ 15.3% | $3.00 | $0.75 | In stock | Visit → | |
| Research Peptides Europe EU | A | Operational | $32.39 ▲ 24.6% | $3.24 | $0.81 | In stock | Visit → | |
| Southern Aminos US | B- | Operational | $33.00 On sale ▲ 26.9% | $3.30 | $0.82 | In stock | Visit → | |
| Felix Chemical Supply US | B- | Watch | $34.99 On sale ▲ 34.6% | $3.50 | $0.87 | In stock | Visit → | |
| Atomik Labz US | B- | Operational | $35.00 ▲ 34.6% | $3.50 | $0.88 | In stock | Visit → | |
| Purus Peptides US | B- | Operational | $35.00 ▲ 34.6% | $3.50 | $0.88 | In stock | Visit → | |
| Solution Peptides US | B- | Watch | $35.00 ▲ 34.6% | $3.50 | $0.88 | In stock | Visit → | |
| Research Peptides US | B | Operational | $37.99 ▲ 46.1% | $3.80 | $0.95 | In stock | Visit → | |
| AMC Essentials US | B | Operational | $39.99 ▲ 53.8% | $4.00 | $1.00 | In stock | Visit → | |
| One Day Compounds US | B- | Operational | $39.99 ▲ 53.8% | $4.00 | $1.00 | In stock | Visit → | |
| Glacier Aminos US | B | Operational | $40.99 ▲ 57.7% | $4.10 | $1.02 | In stock | Visit → | |
| Peptide Hub US | B- | Operational | $45.00 ▲ 73.1% | $4.50 | $1.13 | In stock | Visit → | |
| Ascension Peptides US | B | Operational | $47.50 On sale ▲ 82.7% | $4.75 | $1.19 | In stock | Visit → |
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Last crawl 2026-09-09Sort:
2026-09-09Semax · 11mg
1 vendors
Operational
$35.00
$3.18/mg· $0.80/dose
In stock◎ Best $/mg
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| FITSKNS Research Group US | B- | Operational | $35.00 ◎ Best $/mg | $3.18 | $0.80 | In stock | Buy with code → |
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Last crawl 2026-09-09Sort:
2026-09-09Semax · 25mg
1 vendors
Operational
$63.00
$2.52/mg· $0.63/dose
In stock◎ Best $/mg
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| Core Peptides US | A | Operational | $63.00 ◎ Best $/mg | $2.52 | $0.63 | In stock | Buy with code → |
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Last crawl 2026-09-09Sort:
2026-09-09Semax · 30mg
2 vendors
B-
Operational$90.00
$3.00/mg· $0.75/dose
In stock◎ Best $/mg
Watch
$90.00
$3.00/mg· $0.75/dose
In stock▲ 0.0% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| Atomik Labz US | B- | Operational | $90.00 ◎ Best $/mg | $3.00 | $0.75 | In stock | Buy with code → | |
| Solution Peptides US | B- | Watch | $90.00 ▲ 0.0% | $3.00 | $0.75 | In stock | Visit → |
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Last crawl 2026-09-09Sort:
2026-09-09Semax · 40mg
1 vendors
B-
Watch$149.99
$3.75/mg· $0.94/dose
In stock◎ Best $/mg
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| Modified Aminos US | B- | Watch | $149.99 ◎ Best $/mg | $3.75 | $0.94 | In stock | Buy with code → |
Sort:
Last crawl 2026-09-09Sort:
2026-09-09Semax · 50mg
2 vendors
Operational
$139.99
$2.80/mg· $0.70/dose
In stock◎ Best $/mg
Operational
$139.99
$2.80/mg· $0.70/dose
In stock▲ 0.0% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | $/dose at 0.25 mg | Stock | |
|---|---|---|---|---|---|---|---|---|
| Glacier Aminos US | B | Operational | $139.99 ◎ Best $/mg | $2.80 | $0.70 | In stock | Buy with code → | |
| One Day Compounds US | B- | Operational | $139.99 ▲ 0.0% | $2.80 | $0.70 | In stock | Visit → |
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Last crawl 2026-09-09Sort:
2026-09-09§ Frequently asked
Common questions about Semax
- What is Semax?
- Semax is a synthetic heptapeptide based on a fragment of adrenocorticotropic hormone (ACTH 4-10) with a C-terminal Pro-Gly-Pro extension. It is studied in Russian neurology research for neuroprotection and cognitive-enhancement endpoints.
- Is Semax FDA-approved?
- No. Semax is not approved by the FDA, MHRA, Health Canada, or the TGA. It has been used clinically in Russia under the regulatory framework of the Russian Federation, but Western research-peptide vendors sell it strictly as a research compound.
- What is the half-life of Semax?
- Pepticker does not publish a quantitative plasma half-life for Semax — published Russian pharmacokinetic data are not as readily available as for prescription peptides, and ranges reported in the literature vary by route and assay method.
- What dose of Semax is used in research?
- Doses reported in published Russian studies vary by route (intranasal is most common) and endpoint. Pepticker does not publish a dosing protocol — refer to the original literature for the model you are reproducing.
- What is Semax commonly stacked with?
- Semax is most often discussed alongside Selank in the published Russian neuropeptide literature, with researchers studying combined or sequential protocols across cognitive and anxiolytic endpoints.
- Is Semax legal?
- Semax is sold for research use in the US, Canada, and the UK. In Australia it is TGA Schedule 4 and personal import is tightly controlled. Status is informational — not legal advice.
Editorial summary of published research. Not medical advice. See /methodology for sourcing.
Research use only. The compounds listed on this page are not approved for human use through research-chemical channels. Nothing on this page is medical advice. Consult a qualified clinician before considering any peptide protocol. See affiliate disclosure and our scoring methodology.
Keep exploring
More on Semax & related research
Related peptides
- Selank— Anxiolytic neuropeptide
- N-Acetyl Semax Amidate— Acetylated amidated Semax
- N-Acetyl Selank— Acetylated Selank for stability
- Dihexa— BDNF-potentiating hepatapeptide
- Cerebrolysin— Neurotrophic peptide mixture
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