Neuropeptide Y (NPY)
Also known as: NPY
A stress-response neuropeptide that modulates anxiety, appetite, and circadian rhythm. Researched for anxiety reduction and stress resilience.
Beginner Basics
Plain-English guide to Neuropeptide Y (NPY)
What it does
NPY is a chemical messenger in your brain that helps control stress responses, anxiety, appetite, and your sleep-wake cycle. Researchers study it because it may help people feel calmer and more resilient when facing stressful situations.
Typical dose
Researchers typically use 0.5-2 micrograms (very small amounts) once or twice daily, injected under the skin with a small insulin-style needle.
When to inject
Morning and/or evening injections are common in research studies; timing can vary depending on the specific research protocol you're following.
Storage
Keep the dry powder in a cool, dark place until you mix it. Once mixed with the solution, store it in the refrigerator and use within the timeframe specified by your supplier.
First-timer tip
Start with the lowest dose and gradually increase based on how your body responds, since research dosing varies widely and tolerance builds slowly.
On This Page
Research Status
Clinical trials
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
Typically resolve within 1-2 hours. Minimize by allowing solution to reach room temperature, using proper injection technique, and rotating sites. Apply ice if swelling persists.
May occur within hours of injection. Usually self-resolving. Ensure adequate hydration and consider timing of injection relative to meals.
More common with higher doses or rapid dosing escalation. Sit or lie down if experienced. Typically resolves within 30 minutes.
May occur shortly after injection. Take with food or ginger if bothersome. Usually transient and dose-dependent.
NPY naturally stimulates feeding behavior. This is an expected pharmacological effect. Monitor food intake if weight management is a concern.
Timing of injection may influence circadian effects. Evening dosing may promote sleep; morning dosing may cause alertness. Adjust timing based on individual response.
Develops with repeated injections at the same site. Prevent by strict site rotation. Rotate systematically and maintain a log. Effects may be reversible if rotation is implemented early.
Seek immediate medical attention if rash, swelling of face/throat, or difficulty breathing occurs. Discontinue use and do not re-administer.
NPY modulates emotional regulation. Some users report improved mood; others may experience emotional shifts. Monitor mental state and discontinue if significant mood disturbance occurs.
NPY has cardiovascular effects. Monitor blood pressure, especially in users with hypertension history. Discontinue if sustained elevation occurs.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 0.5-2 mcg |
Frequency, timing and route - members only | |
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline, use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2-8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
| Molecular weight | 4382 |
| Half-life | 1-2 minutes (in circulation); longer in CNS due to receptor binding and local effects |
| Sequence | Members only |
Neuropeptide Y (NPY) is an endogenous 36-amino acid neuropeptide that acts primarily through Y1 and Y2 receptors in the central and peripheral nervous systems. It modulates stress responses, anxiety, appetite regulation, and circadian rhythms by influencing hypothalamic-pituitary-adrenal (HPA) axis activity and neurotransmitter systems. NPY is particularly abundant in the amygdala, hippocampus, and hypothalamus, where it exerts anxiolytic and stress-buffering effects.
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Recent Research
Central neuropeptide Y differentially regulates body temperature between heat-exposed and non-heat-exposed chicks.
Exploratory Single-Nucleus RNA Sequencing Suggests Glial-Specific NPY Upregulation and Cell-Type-Specific Metabolic Alterations in Temporal Lobe Epilepsy.
Neonatal Overnutrition Induces Long-Lasting Hypothalamic POMC Silencing and Shapes Distinct Obesity Phenotypes According to Adult Dietary Environments.
Source: PubMed / NCBI. Updated daily. Articles are listed for research reference only.
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View all peptidesResearch Use Only. All content on this page is provided for informational and educational purposes related to scientific research. Neuropeptide Y (NPY) is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.