P21
CNTF-derived speculative research peptide. Minimal human evidence; honest tracking if used experimentally.
- Half-life
- Not established
- Out of system
- —
- Route
- Subcutaneous
- Level
- Advanced
What P21 is used for
- Speculative CNTF-derived nootropic — neurogenesis research
- Of interest for memory and focus
How it's typically used
No established human protocol. Reported research range: ~300 mcg subcutaneous daily.
What to watch for
- Human evidence is essentially zero
- No established safety or dosing
- Research-only; highly experimental
About Other research compounds
- What they are
- Nootropics, metabolic agents, and research compounds that don't fit the other classes.
- How they're run
- Route and schedule vary widely — check the individual entry.
- What to watch
- This is the least-characterised corner of the atlas. Read the full guide, and treat anything without published human data as exactly that.
Full guide
P21: Tracking a Speculative CNTF-Derived Research Peptide
What P21 is, why the human evidence is essentially zero, and how to track it honestly if you choose to experiment at all.
Other other research compounds
Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.