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P21 Dosage Guide
Complete dosing protocol, reconstitution steps, and interactive calculator for P21.
Dosing & Reconstitution Guide
Doses used in early-stage rodent studies range from 250–500 μg/kg administered intranasally or intraperitoneally. P21 has no clinical use authorization.
Standard / Gradual Approach
5mg VialstandardPhaseDoseVolume
Week 1100mcg4 units
Week 2200mcg8 units
Week 3300mcg12 units
Week 4400mcg16 units
Protocol Summary
Subcutaneous (SQ): Dependent on clinical trial design and indication · Dose range 100–500 mcg with gradual titration
Cycle Length: 4–8 weeks typical; reassess before extending
Frequency & Cycling
SubQ Injection
Research-based peptide. Frequency and cycle duration determined by protocol in tumor or neurodegenerative studies.
🧪 Quick Start
Vial Size
5 mg
BAC Water
2 mL
Concentration
2500 mcg/unit
🧮 Dose Calculator
Concentration
25.0
mcg/unit
Draw Volume
20
units (0.200 mL)
For a 500 mcg dose, draw 20 units on a U-100 insulin syringe