P21
Experimental neurogenic peptide. Preclinical only.
What it is
A synthetic peptide derived from research on ciliary neurotrophic factor.
What it does
Investigated in animal models for effects on neurogenesis and cognitive markers.
Does it work?
Evidence is preclinical. Human data supporting cognitive benefit is not available.
Claims vs data
Each marketing claim, tagged by what the evidence actually supports.
| Promotes neurogenesis in animal models | animal data only |
| Improves human memory and learning | overreach |
Reference figures
Quoted from published reference material. These are not Peptuity recommendations.
Evidence count unavailable
Search term ambiguous — manual review pending.
Regulatory status
Formal, dated regulatory actions.
WADA — Prohibited List 2026
Prohibited in sport — WADA S0 (substance without any health-authority approval)
Common questions
What is P21 derived from?
From research on ciliary neurotrophic factor (CNTF), engineered as a small peptide intended to mimic part of its neurotrophic signalling.
Why is your evidence counter unavailable for it?
The name P21 collides with an unrelated and heavily studied cancer gene, so automated counts would be misleading. We show nothing rather than a wrong number.
Is there any human data?
None that we are aware of. The neurogenesis findings are animal work.