Semax
Also known as: Semax nasal spray · Heptapeptide Semax · MEHFPGP
Semax stimulates Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF) synthesis and release, promoting neurogenesis, synaptic plasticity, and neuronal survival. It modulates dopaminergic and serotonergic neurotransmission, enhancing cognitive function, memory consolidation, and focus. It has neuroprotective properties via activation...
What It Is
Semax stimulates Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF) synthesis and release, promoting neurogenesis, synaptic plasticity, and neuronal survival. It modulates dopaminergic and serotonergic neurotransmission, enhancing cognitive function, memory consolidation, and focus. It has neuroprotective properties via activation of antioxidant defense systems and reduction of neuroinflammation. Its Pro-Gly-Pro tail protects it from rapid enzymatic degradation and facilitates BBB crossing. Clinical use in Russia for stroke, optic nerve disease, and cognitive decline.
Supplies Needed
Reconstitution solvent
Intranasal delivery device
Subcutaneous injection
Sterilization
Storage
Store at -20C for up to 2 years. Protect from light and moisture.
Refrigerate at 2-8C; use within 30 days.
This information is provided for educational and research purposes only. Not approved for human consumption by the FDA or any regulatory body. Always consult a qualified medical professional.
Dosing Protocols
Timing: Morning and/or midday; avoid evening (may disrupt sleep). Start with single morning dose; cycle on/off to prevent tolerance
↓ Apply these values to the reconstitution calculatorTiming: Morning and early afternoon. Most common research protocol; subcutaneous injection is also used
↓ Apply these values to the reconstitution calculatorTiming: Morning, midday, and early afternoon. Higher doses for cognitive enhancement or neuroprotection; maintain cycling protocol
↓ Apply these values to the reconstitution calculatorWeekly Timeline
| Week | Expected Effects |
|---|---|
| Week 1 | Improved focus and mental clarity; enhanced working memory; mild mood elevation |
| Week 2 | More sustained cognitive improvements; better verbal recall; reduced brain fog |
| Week 4 | Significant neuroplasticity benefits; improved long-term memory consolidation; enhanced learning capacity |
| Week 8 | Peak cumulative BDNF-mediated benefits; sustained cognitive enhancement |
Reconstitution Calculator
1 unit on U-100 syringe = 0.01 mL · Always label your vial after reconstitution
Injection Technique & Reconstitution
- Remove flip-top cap from the vial
- Swab rubber stopper with alcohol swab
- Draw appropriate volume of sterile 0.9% saline or bacteriostatic water
- Inject slowly down the vial wall
- Gently swirl until dissolved
- For intranasal use: transfer solution to nasal spray bottle
- Label with reconstitution date; refrigerate at 2-8C
Use our free calculate your Semax dose to get the exact syringe units for your vial size and dose.
Mechanism of Action
Semax stimulates Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF) synthesis and release, promoting neurogenesis, synaptic plasticity, and neuronal survival. It modulates dopaminergic and serotonergic neurotransmission, enhancing cognitive function, memory consolidation, and focus. It has neuroprotective properties via activation of antioxidant defense systems and reduction of neuroinflammation. Its Pro-Gly-Pro tail protects it from rapid enzymatic degradation and facilitates BBB crossing. Clinical use in Russia for stroke, optic nerve disease, and cognitive decline.
Key Research Papers
Demonstrated neuroprotective and anti-inflammatory gene expression changes in rat brain ischemia models treated with Semax.
View on PubMed →Showed significant upregulation of BDNF and TrkB receptor expression in hippocampal neurons following Semax treatment, explaining its memory-enhancing effects.
View on PubMed →Stacks Well With
Complementary cognitive enhancement - Semax improves focus and memory while Selank provides anxiolytic effects and reduces stress. Together they produce balanced cognitive optimization.
Both are powerful nootropics with different mechanisms - Semax via BDNF and Dihexa via HGF/c-Met signaling - potentially synergistic for cognitive enhancement.
Frequently Asked Questions
Semax is a nootropic peptide used for cognitive enhancement, memory improvement, BDNF stimulation, and neuroprotection. It is approved in Russia for stroke treatment, optic nerve damage, and cognitive decline.
Yes - intranasal is the preferred research route because it provides direct delivery to the brain via olfactory neurons, bypassing the blood-brain barrier and achieving high CNS concentrations.
Acute cognitive effects last 4-8 hours per dose. However, BDNF elevation and neuroplasticity benefits accumulate over weeks of consistent use, providing lasting improvements in memory and learning.
Legal Status by Region
This information is provided for educational and research purposes only. Not approved for human consumption by the FDA or any regulatory body. Always consult a qualified medical professional.