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Compound Deep-Dive

Tier 3: Research ChemA potent neuroprotective peptide with strong cognitive benefits, though long-term safety data in healthy users is limited.

Semax

HeptapeptideMEHFPGPMet-Glu-His-Phe-Pro-Gly-ProACTH 4-10Semax peptide

Powerful but requires careful sourcing.

Hype Risk

7/10

Noticeability

8/10

Evidence Tier

Emerging

Cost / Month

~$45

Not for general wellness

What it's actually good for

Focus

Research Supported

Strong evidence for improved attention and mental clarity.

Mood

Mixed Evidence

Can improve mood but may cause irritability or anxiety in some.

Recovery

Research Supported

Clinically used for neuroprotection and stroke recovery.

Energy: alignedSleep: neutralMuscle: neutralLongevity: neutralImmunity: neutral

How it works

Semax is a synthetic peptide derived from ACTH, primarily used in Russia for stroke recovery and cognitive enhancement. It is known for increasing BDNF levels and providing neuroprotective effects without typical stimulant side effects.

Acts as a melanocortin receptor agonist and increases the expression of Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF).

Safety

  • Nasal irritation
  • Headaches
  • Potential hair shedding (anecdotal)
  • Increased anxiety in sensitive users

The full StackRoast report adds

  • The exact dose, timing, and effective range to actually run it at
  • Where people go wrong with it — the dose-creep and timing traps
  • What Semax clashes with or duplicates in your stack
Roast My Stack →

Community Reality Check

Distilled from 1200 threads
Confidence: high

What users report

  • Mental clarity
  • Verbal fluency
  • Reduced brain fog

The catch

  • Hair shedding concerns
  • Anxiety and irritability
  • High cost

Side effects reported

  • Nasal irritation
  • Headache
  • Insomnia
  • Hair shedding
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The Receipts

9 sources— studies, videos & links

Videos

Semax - The Russian Nootropic

Nootropics Expert

A detailed breakdown of Semax benefits, dosage, and safety from a leading nootropics reviewer.

Semax Review: The Ultimate Brain Peptide?

Boost Your Biology

Explores the science of Semax and its effects on mental performance and mood.

Papers

Creators

David Tomen

YouTube

Expert in nootropics and cognitive enhancement with extensive experience reviewing peptides.

Lucas Aoun

YouTube

Biohacker and researcher focused on peptide therapy and hormonal optimization.

Clinical Sources

Taking Semax in a stack? Find out if the combination actually makes sense.

Roast My Stack →