What is the half-life of P-21?
P-21 has a reported half life of ~hours, given subcutaneous. That is why it is typically dosed daily. A shorter half life means more frequent dosing to keep blood levels steady, a longer one lets you space doses further apart.
Quick facts
- Half-life: ~hours
- Route: Subcutaneous
- Typical schedule: Daily
- Cycle length: Short courses
References
- Prevention of dendritic and synaptic deficits and cognitive impairment with a neurotrophic compound — Baazaoui N, Iqbal K. Alzheimer's Research & Therapy, 2017
- Alzheimer's Disease: Challenges and a Therapeutic Opportunity to Treat It with a Neurotrophic Compound — Baazaoui N, Iqbal K. Biomolecules, 2022
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
More on P-21
Last updated 2026-06-06.