Semax vs Cerebrolysin
Peptide nootropics compared: a synthetic ACTH-related peptide studied for focus and memory vs the brain-peptide complex studied in cognitive research. Here's a neutral, sourced side-by-side — no hype, every claim links to its evidence.
Semax
ApprovedAlso: Semax + Hopantenic acid combination, Semax + Epitalon
Semax is a man-made substance that acts like a small protein in the body. It is based on a natural hormone but is changed to last longer and work better.
Cerebrolysin
ApprovedAlso: Cerebrolysin UK & Lab UK, Cortexin / Cerebrolysin (Polypeptides of cattle brain cortex)
Cerebrolysin is a brain-health therapy made from tiny protein pieces called peptides, which come from purified brain proteins. It is grouped with other 'neurotrophic' therapies, meaning treatments that help brain cells grow, heal, and survive.
At a Glance
| Semax | Cerebrolysin | |
|---|---|---|
| Research status | Approved | Approved |
| Highest-tier evidence | Peer-reviewed study | Peer-reviewed study |
| Research citations | 31 | 8 |
| Dosing routes | SubQ | SubQ |
| Receptor targets | — | — |
| Half-life | — | — |
| Known side effects | 0 | 2 |
Research Areas
Top preclinical research areas — cited studies for each.
Semax
- Inhibition of enkephalin-degrading enzymes
- Modulation of regulatory peptides via enzyme inhibition
- Modulation of striatal serotonergic system
- Enhancement of striatal dopamine release elicited by d-amphetamine
- Stimulation of BDNF expression
Cerebrolysin
- Supports recovery after acute ischemic stroke
- Decreases apoptotic cells from 32% to 10% in serum-free medium at 100 µg/ml concentration
- Neuroprotective effect in vivo likely results from trophic activity
- Improves cognitive function in schizophrenia
- Improves functional independence at 90 days post-stroke when used as add-on to mechanical thrombectomy
How People Use It
Reported routines — research only, not medical advice.
Semax
- SubQ — Not specified in sources
- SubQ — 200-900 mcg/day
- SubQ — 3,000-9,000 mcg/day
- SubQ — 200-600 mcg daily
- SubQ — 2 to 3 drops per nostril, 2 to 3 times daily (200 to 900 mcg/day)
- SubQ — 3,000 to 9,000 mcg daily
- — 200–500 mcg once daily SC (intranasal: 600–1500 mcg/day)
Cerebrolysin
- SubQ — 30 mL in 250 mL physiological saline
The Evidence
Key studies — click through to verify each on PubMed.
Semax
31 sourced studies
- Source
Effect of semax on the temporary dynamics of brain-derived neurotrophic factor and nerve growth factor gene expression in the rat hippocampus and frontal cortex
2008 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
A nootropic adrenocorticotropin analog 4-10-semax (l5 years experience in its design and study)
1997 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Semax and selank inhibit the enkephalin-degrading enzymes from human serum]
2001 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Neuroprotective and antiamnesic effects of Semax during experimental ischemic infarction of the cerebral cortex.
2006 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Cerebrolysin
8 sourced studies
- Source
Therapeutic effect of Cerebrolysin on reducing impaired cerebral endothelial cell permeability.
2021 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Neuroprotection by Cerebrolysin and Citicoline Through the Upregulation of Brain-Derived Neurotrophic Factor (BDNF) Expression in the Affected Neural Cells: A Preliminary Clue Obtained Through an In Vitro Study
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Cerebrolysin, a mixture of neurotrophic factors induces marked neuroprotection in spinal cord injury following intoxication of engineered nanoparticles from metals
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
[Cerebrolysin peptides as mood stabilizers]
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Decision Guide
How to Choose
Neither is a “winner” — they suit different goals. Compare the documented benefits and evidence above against what you’re actually trying to achieve, note the research status (approved vs research-stage), and read each full guide before deciding. Many people also stack peptides rather than pick one.
Source Semax
Shop SemaxSource Cerebrolysin