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P21: Reference Overview and Reconstitution Notes
Machine-readable facts for this Lab article. The full page is https://www.preppinpeppers.com/blogs/the-lab/p21.
TL;DR
P21 (P021) is a synthetic peptide derived from ciliary neurotrophic factor (CNTF), studied in nerve cell and brain research. Research only; not FDA-approved.
Facts Index
| Fact ID | Category | Entity | Attribute | Value | Source |
|---|---|---|---|---|---|
| p21:title | identity | P21: Reference Overview and Reconstitution Notes | title | P21: Reference Overview and Reconstitution Notes | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:published | identity | P21: Reference Overview and Reconstitution Notes | published | 2026-08-06 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:author | identity | P21: Reference Overview and Reconstitution Notes | author | Preppin' Peppers Editorial Team | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:topics | identity | P21: Reference Overview and Reconstitution Notes | topics | research, Research-only | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:summary | content | P21: Reference Overview and Reconstitution Notes | summary | P21 (P021) is a synthetic peptide derived from ciliary neurotrophic factor (CNTF), studied in nerve cell and brain research. Research only; not FDA-approved. | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-1 | content | P21: Reference Overview and Reconstitution Notes | section | What it is | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-2 | content | P21: Reference Overview and Reconstitution Notes | section | P21 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-3 | content | P21: Reference Overview and Reconstitution Notes | section | What it is | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-4 | content | P21: Reference Overview and Reconstitution Notes | section | Research context and categorization | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-5 | content | P21: Reference Overview and Reconstitution Notes | section | Status | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-6 | content | P21: Reference Overview and Reconstitution Notes | section | Reconstitution notes (general) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-7 | content | P21: Reference Overview and Reconstitution Notes | section | Dilution and handling notes (compound-specific) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-8 | content | P21: Reference Overview and Reconstitution Notes | section | Handling and storage | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-9 | content | P21: Reference Overview and Reconstitution Notes | section | Related reading | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-10 | content | P21: Reference Overview and Reconstitution Notes | section | Tools and supplies | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:section-12 | content | P21: Reference Overview and Reconstitution Notes | section | What the research community gets wrong about P21 handling | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:product-gansulin-metal-peptide-pen | products | P21: Reference Overview and Reconstitution Notes | references product | Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:product-gansulin-3ml-cartridge | products | P21: Reference Overview and Reconstitution Notes | references product | Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pubmed-ncbi-nlm-nih-gov | source | P21: Reference Overview and Reconstitution Notes | cites | Kazim SF et al., Neurobiol Dis 2014 (PMID 25046994) , disease-modifying chronic oral treatment with the CNTF-derived peptide P021 in a 3xTg-AD mouse model - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pmc-ncbi-nlm-nih-gov | source | P21: Reference Overview and Reconstitution Notes | cites | Baazaoui N, Iqbal K, Alzheimers Res Ther 2017 (PMC5488423) , prevention of dendritic and synaptic deficits with the neurotrophic compound P021 (Ac-DGGLAG-NH2, MW 578.3; adamantylated glycine for stability and blood-brain permeability; gastric, intestinal, and plasma stability data) - pmc.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pmc-ncbi-nlm-nih-gov-2 | source | P21: Reference Overview and Reconstitution Notes | cites | Diffusion MRI study of neurotrophic peptide mimetic P021 in the 3xTg-AD mouse model, PMC12993872 , confirms P021 is a small water-soluble, orally bioavailable, blood-brain barrier permeable CNTF-derived peptide (CNTF residues 148-151) - pmc.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pmc-ncbi-nlm-nih-gov-3 | source | P21: Reference Overview and Reconstitution Notes | cites | Kazim and Iqbal, Mol Neurodegener 2016: Neurotrophic factor small-molecule mimetics mediated neuroregeneration and synaptic repair: emerging therapeutic modality for Alzheimer's disease - pmc.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pubmed-ncbi-nlm-nih-gov-2 | source | P21: Reference Overview and Reconstitution Notes | cites | Lozupone et al., Expert Opin Drug Discov 2023: The development of peptide- and oligonucleotide-based drugs to prevent the formation of abnormal tau in tauopathies - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
| p21:source-pmc-ncbi-nlm-nih-gov-4 | source | P21: Reference Overview and Reconstitution Notes | cites | Wei et al., J Alzheimers Dis 2021: Neurotrophic Treatment Initiated During Early Postnatal Development Prevents the Alzheimer-Like Behavior and Synaptic Dysfunction - pmc.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/p21) (evidence) |
FAQ
- What is P21 (P021) peptide and what is it studied for in research?
- P21 is a synthetic peptide modeled on part of CNTF, studied in preclinical animal research for hippocampal neurogenesis, dendritic spine morphology, and neurotrophic signaling. It has no FDA approval and no completed human clinical trials.
- How do you reconstitute lyophilized P21 peptide for laboratory use?
- Draw the required volume of bacteriostatic water into a syringe, inject it slowly down the inner vial wall (not directly onto the powder), then gently swirl—do not shake—until the powder is fully dissolved before proceeding at the lab bench.
- Is P21 FDA-approved or listed on the WADA Prohibited List?
- P21 is not FDA-approved and not named on the WADA Prohibited List, but it likely falls under WADA S2 (peptide hormones/growth factors) and S0 (non-approved substances). Anyone subject to anti-doping rules should treat it as prohibited.