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Semax
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Semax 10mg

Cognitive

$99

4.0 (24 reviews)

Russian-developed ACTH analog that upregulates BDNF, enhances dopaminergic and serotonergic tone, and improves memory, focus, and neuroprotection.

10mg per vial, lyophilized powder
ACTH(4-7) analog with Pro-Gly-Pro extension
Third-party tested for purity and potency
Intranasal or subcutaneous administration
1
Third-party tested

Overview

Semax is a heptapeptide analog of ACTH(4-10) developed at the Institute of Molecular Genetics in Moscow and approved in Russia for stroke, cognitive decline, and optic nerve disease. It dramatically upregulates BDNF (brain-derived neurotrophic factor) and its receptor TrkB, enhancing synaptic plasticity and neuronal survival. It also modulates dopaminergic, serotonergic, and cholinergic systems for acute cognitive enhancement.

Lab Results — 10mg

Every batch is independently tested. Results below are from the Certificate of Analysis for the 10mg batch.

Test
Result
Status
Identity (HPLC-MS)
Confirmed Semax
Pass
Purity
98.8%
Pass
Heavy Metals (Pb)
< 0.05 ppm
Pass
Endotoxin (LAL)
< 1 EU/mg
Pass
Residual Solvents
Not detected
Pass

Scientific Details

Molecular Formula

C₃₇H₅₁N₉O₁₀S

Molecular Weight

813.9 g/mol

Form

Lyophilized peptide powder

Solubility

Soluble in sterile water or saline

Dosage Range

200–900mcg daily intranasal (research context)

Plasma Half-Life

~20 minutes (plasma); prolonged CNS effects

Bioavailability

~90% intranasal

Resources

Key peer-reviewed studies supporting the efficacy and safety of this compound.

Semax and BDNF upregulation in rat brain

Shadrina M.I. et al.Journal of Molecular Neuroscience (2010)

Key FindingSemax administration produced a 1.6-fold increase in BDNF mRNA expression in the rat hippocampus within 24 hours.

Neuroprotective effects of Semax in ischemic stroke

Miasoedov N.F. et al.Zhurnal Nevrologii i Psikhiatrii (1999)

Key FindingSemax reduced infarct volume and improved neurological outcomes in a randomized controlled trial of acute ischemic stroke patients.

ACTH(4-10) analogs and cognitive performance

De Wied D.Progress in Brain Research (1990)

Key FindingACTH fragment analogs improved attention, memory consolidation, and cognitive flexibility in both animal models and human trials.