Semax
Mechanism
A synthetic analog of ACTH(4-10) developed in Russia. Upregulates BDNF (brain-derived neurotrophic factor), enhances dopamine and serotonin metabolism, and improves focus, memory, and cognitive performance without stimulant side effects.
Typical dose
200-600mcg per day intranasal, split into 2-3 doses
Cycle length
10-20 days on, 10 days off
Form
Intranasal spray
Where to source it
The hard part with Semax isn't the protocol. It's finding a supplier that can prove what's in the vial. We assessed dozens against per-batch, third-party testing. A handful passed.
See the sources that passed →Semax protocols
Deep dives on Semax
- Semax Complete Guide: Russian Neuropeptide for Focus and Memory (2026)Semax complete guide: how Russia's BDNF-upregulating neuropeptide improves focus and memory, full dosing protocols, variant comparison, side effects, and sourcing
- How to Reconstitute Peptides: Step-by-Step Dosing Guide (2026)Step-by-step guide to reconstituting peptides: diluent selection, concentration maths, injection technique, storage, and common mistakes with worked examples.
- Best Peptides for Men Over 40: Recovery, Performance, and Longevity (2026)The four best peptides for men over 40 ranked by mechanism, dosing protocol, and evidence grade. BPC-157, TB-500, CJC-1295, ipamorelin, and Semax explained.
- Semax vs Selank: Which Nootropic Peptide Is Right? (2026)Semax vs Selank compared: mechanisms, dosing, stacking, and which nootropic peptide fits your goals. Evidence-based guide for focus, anxiety, and cognition.
- Selank Peptide Guide: Anti-Anxiety Neuropeptide for Calm Focus (2026)Complete Selank peptide guide: mechanisms, dosing protocols, stacking strategies, and safety. Non-sedating anxiety relief with genuine cognitive enhancement.
- Which Peptides Are Legal Again in 2026? The Full FDA ListComplete guide to the 14 peptides returning to legal compounding status in 2026 after RFK Jr.'s FDA reclassification announcement. Every compound explained.
- What the FDA Reclassification Actually Means for Peptide UsersLearn how to evaluate peptide suppliers, read a third-party COA, spot counterfeits, and verify lab testing quality after the 2026 FDA reclassification.
- Can Peptides Help Cure Loss of Smell? Evidence on Anosmia and Olfactory Repair (2026)Peptides for anosmia have compelling mechanisms but zero human RCT evidence. We examine why clinical adoption has stalled and what the science actually supports.
- 5 Peptide Stacks That Actually Work: Evidence-Based ProtocolsPeptide stacks outperform singles only when conditions align. Grade 5 evidence-based stacks, identify weak synergy claims, determine when solo protocols win.
- Best Nootropic Peptides for Focus and Memory: RankedThe conventional Semax-Noopept-MOTS-c ranking leans on disease-population trials. Here is what the primary literature actually shows, and who each peptide really fits.
- 8 Peptides Now Legal Again in 2026: What Each One Does and Who BenefitsThe peptides legal 2026 list: BPC-157, TB-500, Semax, CJC-1295, Thymosin Alpha-1, AOD-9604, GHK-Cu and MOTS-c reviewed with evidence grades, access routes and who
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