P21
P21 is a synthetic, palmitoyl peptide derived from CNTF signaling and studied for hippocampal neurogenesis; the small community around it runs the peptide for cognitive enhancement and memory. The captured community corpus totals two reports—both positive, both low-confidence—which affirm the cognitive use case but offer no dose, timing, or cycling details. The off-label evidence base is thinner than online discussion implies; exploratory indications in the literature carry virtually no posted human results, so there is very little solid ground beyond those two anecdotal reports.
Research Evidence
Evidence shape
P21 has limited clinical evidence: two Phase 1 trials in acute myeloid leukemia and idiopathic thrombocytopenic purpura enrolled sixteen subjects combined, with blinded results posted for only one. Across three mapped indications and two distinct sponsors, the other completed trial has no posted results and the third indication is animal-only preclinical work. The long tail is single-trial exploration that has not been replicated at scale.
Anecdotal efficacy
Side effects
Clinical research side effects
Clinical safety table not projected yet.
Anecdotal side effects
Price
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Dosing & Protocol
How P21 is dosed across research, clinician, and community sources — each evidence tier kept separate so the dose range, frequency, timing, and cycling stay visible without flattening different levels of evidence.
- Timing
- unspecified
- Cycle
- unspecified
2 completed trials identified; trial dosing not reliably extracted from registry data.
No structured protocol details captured for this tier yet.
- Frequency
- unspecified
- Route
- subQ
- Cycle
- unspecified
Community reports for P21 are limited, with 2 reports specifically mentioning cognitive enhancement and memory benefits, all showing positive outcomes. Specific dosing insights are absent in community discussions.
Peptide Deep Dive
Peptide Deep Dive is not projected for this peptide yet.
Peptide feedback
0 forum repliesLive community discussion for P21, shown here in the site layout and continued on the TVR forum.
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