P21 Peptide Spray
Sold and shipped exclusively by Iron Peptides — the official US manufacturer. Lab-verified ≥99% purity, COA included with every Iron Peptides order.
$139.99
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Availability: 19 in stock
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99%+ PURITY
MADE IN USA
Iron Peptides P21 Peptide Spray is manufactured in the United States in our FDA-registered, cGMP-compliant facility and tested by an independent third-party lab to confirm ≥99% purity. Each vial of Iron Peptides P21 Peptide Spray is sealed under research-grade conditions and ships with its lot-matched Certificate of Analysis, so every order from Iron Peptides arrives ready for reproducible in-vitro work.
What is P21 Peptide Spray?
P21 Peptide Spray is a synthetic research compound designed as an analog of Ciliary Neurotrophic Factor (CNTF). Developed through epitope mapping, it is engineered for enhanced stability and the ability to cross the blood-brain barrier. Unlike CNTF, which binds directly to receptors, P21 works by inhibiting neutralizing molecules, allowing the body’s natural CNTF activity to support neurogenesis and cognitive enhancement.
This product is offered in nasal spray form for ease of application in laboratory or experimental research settings.
Chemical Structure of P21 Peptide Spray
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Molecular Formula: C₃₀H₅₄N₆O₅
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Molecular Weight: 578.8 g/mol
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Synonyms:
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P021
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Peptide 021
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While the exact peptide sequence is not published, it is derived from sequences that mimic CNTF effects and is designed to be stable and biologically active in neuro-research applications.
What Are the Effects of P21 Peptide Spray?
Research-based effects include:
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Neurogenesis:
P21 has demonstrated the ability to stimulate the growth and maturation of neurons, particularly in the hippocampus. It supports the development of neural progenitor cells into mature neurons, which may enhance memory and cognitive function. -
Appetite Regulation:
Preliminary findings suggest that P21 may influence appetite suppression by stimulating the production of alpha-MSH (alpha-melanocyte-stimulating hormone), a neuropeptide linked with reduced food intake. While more research is needed, this suggests possible utility in metabolic or weight-related studies.
Why Choose Iron Peptides for P21 Peptide Spray?
Researchers order P21 Peptide Spray from Iron Peptides for three simple reasons: purity, traceability, and consistency. Every batch of P21 Peptide Spray released by Iron Peptides is HPLC- and MS-verified at ≥99%, every order is shipped from our US facility within one business day, and every vial carries the Iron Peptides lot number printed on its COA. That is the standard that has made Iron Peptides the trusted research source since 2024.
P21 Peptide Spray
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TrustScore 4.3
Edgar Guzman
2026-01-20
I have been taking glp3 for a few…
I have been taking glp3 for a few months and I've been losing about 38 close to 40 lb. I feel great. Lots of energy. I definitely recommend iron. It's to me the most trusted legit company customer service It's amazing. They always have discounts. They always have promotions so if you want to see results go with IRON that's for sure
JC
Jcoop
2026-01-16
Amazing service top-notch products
Amazing service top-notch products, I always receive my peptides within a few days of placing my order.
PV
Paola Vargas
2026-01-16
I have try peptides Reta and it’s so…
I have try peptides Reta and it’s so good helping me with better habits and eating well I feel more energy and my progress it’s easier , very focus and the guiadance on usage it’s so good any questions they are there for you . Def recommend
