-15%P21 Peptide Spray
CNTF-derived neurogenic peptide · 10mL nasal spray · Limitless Life Nootropics
Price with PeptideDeck coupon applied at checkout
PeptideDeck
≥98% Purity
Third-party verified
10mL Spray
Nasal delivery
GMP Compliant
USA manufactured
CNTF Mimetic
Neurogenic peptide
About P21
P21 is a small-molecule peptide mimetic of Ciliary Neurotrophic Factor (CNTF), designed to promote neurogenesis without the immunogenic side effects of full-length CNTF. It has shown particular promise in research on hippocampal neurogenesis, memory formation, and cognitive recovery. The nasal spray form enables direct CNS delivery through olfactory pathways for targeted neurogenic effects.
Product Specifications
Key Benefits
Neurogenesis Stimulation
P21 promotes the generation of new neurons in the hippocampus, the brain region critical for learning and memory formation, through CNTF-mimetic signaling.
Memory Enhancement
By stimulating hippocampal neurogenesis and synaptic plasticity, P21 supports improved memory formation, consolidation, and retrieval processes.
Cognitive Recovery
P21 has shown promise in research models of cognitive decline, supporting recovery of learning and memory functions through neurogenic mechanisms.
BDNF Elevation
P21 elevates Brain-Derived Neurotrophic Factor (BDNF) expression, a key neurotrophin that supports neuronal survival, growth, and synaptic strength.
Anti-Neurodegeneration Potential
Through its neurogenic and neurotrophic actions, P21 supports neuroprotective pathways relevant to age-related cognitive decline and neurodegenerative conditions.
Frequently Asked Questions
What is P21?
P21 is a small-molecule peptide mimetic of Ciliary Neurotrophic Factor (CNTF), engineered to promote neurogenesis without the immunogenic side effects associated with full-length CNTF protein. It was developed to retain the neurogenic benefits of CNTF in a more practical, deliverable form.
How does P21 relate to CNTF?
CNTF (Ciliary Neurotrophic Factor) is a naturally occurring neurotrophin that promotes neuronal survival and differentiation. However, full-length CNTF is immunogenic and difficult to deliver. P21 was designed to mimic CNTF's neurogenic signaling while avoiding these limitations, making it suitable for research applications.
What is neurogenesis?
Neurogenesis is the process of generating new neurons from neural stem cells. In adults, this occurs primarily in the hippocampus (subgranular zone) and the subventricular zone. Hippocampal neurogenesis is closely linked to learning, memory, and mood regulation.
How should P21 spray be stored?
Store P21 nasal spray refrigerated (2-8°C) to maintain peptide integrity. Protect from light and keep the bottle tightly sealed. Avoid repeated freeze-thaw cycles.
How is P21 different from Semax?
While both P21 and Semax are nootropic peptides, they work through different mechanisms. Semax is an ACTH(4-10) analogue that modulates BDNF and has broad neuroprotective effects. P21 specifically mimics CNTF signaling to directly stimulate hippocampal neurogenesis, making it more targeted toward new neuron generation.
How P21 Works
P21 mimics the neurogenic signaling of Ciliary Neurotrophic Factor (CNTF) without triggering the immune response associated with the full-length protein. It activates downstream CNTF pathways that promote neural stem cell proliferation and differentiation in the hippocampus.
The peptide elevates Brain-Derived Neurotrophic Factor (BDNF) expression, a critical neurotrophin that supports neuronal survival, dendritic branching, and synaptic plasticity — the molecular foundations of learning and memory.
P21 promotes dendritic branching and synaptic connectivity in newly generated neurons, integrating them into existing hippocampal circuits. This neurogenic action underlies its effects on memory formation, cognitive recovery, and neuroprotection.