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P21, sometimes written P021, is a small synthetic peptide. It was designed from a short active region of ciliary neurotrophic factor (CNTF), a naturally occurring protein that supports nerve cells. The peptide was chemically modified to make it more stable than the original sequence.
Research on P21 has been preclinical, meaning it has been studied in laboratory and animal models. It has not been established as safe or effective in people.
The name can cause confusion. P21 is also the name of a well-known human protein involved in cell division, which is unrelated to this peptide.
Current status: Not FDA-approved.
This means the FDA has not approved P21 as safe and effective for any medical use. No product containing it is an approved medicine in the United States.
Peptide Labs does not sell this compound. This page is general information, not medical advice. We do not supply, prepare or distribute P21 in any form, and nothing on this page should be read as an offer.
If you have questions about P21 or a related health concern, talk to a licensed healthcare provider who knows your medical history.
See the full list of compound profiles in the Peptide Guide.
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