P21 (Cerebrolysin Peptide)
Synthetic fragment of cerebrolysin. Neurogenesis focus. Evidence is mixed, so set expectations accordingly.
Verdict
4/10 Limited
Evidence
Grade B / 100+ Studies
The No-BS Summary
8 things. 60 seconds. Everything you need.
WHAT IT DOES
Synthetic fragment of cerebrolysin. Neurogenesis focus.
DOES IT WORK?
4/10 Limited. Mimics CNTF activity. May promote neurogenesis. Very limited data. Nasal administration. Experimental.
HOW MUCH TO TAKE
See product label
COST
Premium. $50-80/month. Make sure the evidence backs the spend.
FIRST 24 HOURS
Don't expect miracles on day one. It's building in your system.
AFTER A FEW WEEKS
Give it 4-8 weeks for full effects. Patience pays.
SAFETY
Safe for most people. No red flags at normal doses.
HOW IT FEELS
Subtle cognitive improvements reported. Long-term use needed.
QUICK ANSWERS
+ 4 more questions
DOSE-RESPONSE CURVE
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