Healing Category
P21
THE NEUROGENESIS BOOSTER
Neurotrophic Peptide P21; CNTF Analog
P21 is an engineered peptide based on ciliary neurotrophic factor (CNTF) that can cross the blood-brain barrier and promote neurogenesis, the growth of new brain cells. It boosts BDNF (brain-derived neurotrophic factor) and has shown promise for cognitive enhancement, Alzheimer's prevention, and stroke recovery.
P21 Evidence Snapshot
How these guides are reviewed- Regulatory status
- Not FDA approved · research use only
- Dosing guidance
- Reviewed by our clinical team
- Linked evidence
- 1 research sources
- Content updated
- Aug 28, 2026
Dose and schedule recommendations shown below come from The Peptide App Clinical Team. Research links are provided so readers can inspect the supporting evidence directly. Review the sources.
Quick Answers About P21
Is P21 FDA approved?
No. This profile records P21 as not FDA approved and for research use only.
More context
Review the regulatory and source details on this page for the current context.
What dose does The Peptide App Clinical Team recommend for P21?
Dose: 10 mg daily (subcutaneous, intramuscular, or oral).
More context
Schedule: daily. Cycle: 8 weeks on, 8 weeks off. This is clinical-team guidance for reference and does not replace individualized instructions from a licensed clinician.
What research supports this P21 guide?
This guide links to 1 curated or current research sources.
More context
Open the research section to inspect the source titles, publication details, study types, and available abstracts directly.
Review the P21 research sourcesStudied Effects & Mechanisms
Neurogenesis
Promotes growth of new neurons in the hippocampus
BDNF Boost
Upregulates brain-derived neurotrophic factor
Anti-Amyloid
Reduces amyloid-beta and tau pathology
Synaptic Plasticity
Enhances NMDA receptor activity for learning
Who is this for
Those concerned about cognitive decline · People wanting to enhance memory and focus · Those with family history of Alzheimer's · Stroke recovery patients
Research-Market Price Snapshot
A compact market signal for this profile. The dedicated pricing page owns vendor, vial-size, and price-per-mg comparisons.
Updated Aug 29, 2026
- Vendors
- 8
- Listings
- 9
- Observed range
- $61–$198
Market evidence
P21 product testing and COAs
Current certificates are on file for 4 of 9 vendors tracked in the P21 market. Research on this page describes the molecule. Vendor certificates concern particular market samples or batches; they do not change the research evidence or establish clinical safety, sterility, or suitability for use.
P21 Research
Live research temporarily unavailable
The live research feed did not return papers for this page. The curated references below remain available for crawlable source context.
Research references
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