P21 5 MG

P21 5 mg – Peptide Hubs

P21 is a synthetic nootropic peptide originally developed to enhance memory, learning, and neurogenesis in preclinical models of brain injury and cognitive decline. It is based on a modified segment of the CNTF (ciliary neurotrophic factor) and penetratin peptide to facilitate blood-brain barrier transport and receptor binding. Peptide Hubs offers P21 in 5 mg high-purity lyophilized form for research use only.

Mechanism of Action

P21 appears to promote neurogenesis, neurotrophic signaling, and synaptic plasticity by enhancing expression of proteins like GAP-43 and BDNF. It also shows potential to regenerate neuronal architecture in animal models of cognitive injury, particularly in aging or chemically-induced brain damage. This review on peptide nootropics discusses emerging candidates like P21 in neurodegeneration and trauma.

Research Applications

• Memory enhancement and cognitive performance studies
• Brain injury and regeneration models
• Alzheimer's and neurodegenerative disorder protocols
• Long-term potentiation and synaptogenesis investigations

P21 is often paired with N-Acetyl Semax Amidate or N-Acetyl Selank Amidate in emotional memory and neuroplasticity studies. For mitochondrial synergy, researchers combine it with Humanin or MOTS-c. DNA repair models frequently include FOX04-DRI in stacked protocols for cellular senescence and neuroprotection.

Suggested Experimental Use

• Dosage: 250–500 mcg per day (subcutaneous or intranasal)
• Cycle: Typically 10–30 days in learning or neuroregeneration protocols
• Storage: Store lyophilized peptide at -20°C and reconstituted solution at 2–8°C

Stacking Recommendations

• N-Acetyl Semax Amidate – for BDNF synergy
• Humanin – neuroprotective synergy
• FOX04-DRI – for senolytic brain aging models
• MOTS-c – mitochondrial coactivation

Safety & Legal Status

P21 is not FDA-approved and is sold strictly for laboratory research. It has shown low toxicity and no hormonal disruption in rodent studies. No known aromatization, liver stress, or cardiovascular effects have been reported. Use in accordance with institutional and regulatory research protocols.

Frequently Asked Questions