Research-grade compound. Laboratory use only. Not intended for human or animal use, ingestion, or injection. No medical claims are made or implied.
≥98% PurityIn-House HPLC & MS Tested
Thymic Research PeptidesSKU: CP-VIP
VIP
≥99% PurityHPLC & MS verified
From €32.99Out of Stock
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Research-grade VIP. 99.3% avg purity, HPLC & MS verified. Lyophilized powder in sealed glass vial. For laboratory research use only. Not for human consumption.
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Important Notice
This product is intended for laboratory and research use only. Not for human or veterinary use. By purchasing, you confirm this product will be used exclusively for in-vitro research purposes.
When This Product May Not Suit Your Research
- ⚠If your research requires GMP-grade material for clinical applications — research-grade peptides are not intended for clinical use.
- ⚠If your lab lacks proper cold storage (-20°C freezer) — this peptide's stability may be compromised at higher temperatures.
- ⚠If your study protocol requires FDA-approved reference standards — contact USP or a certified reference material provider.
Purity HPLC
99.3% average HPLC purity, verified by independent third-party testing
Third-Party Tested
Janoshik report published when available
Fast Shipping
24h dispatch, EU-wide shipping from €4.99
Third-Party Tested
Independent lab verification for every batch
Last reviewed: 2026-04-05
About VIP
Vasoactive Intestinal Peptide (VIP) is a 28-amino acid neuropeptide originally discovered in porcine intestine in 1970. The name describes the initial pharmacological observation -- it is vasoactive and found in the gut -- but underrepresents the peptide's biology. VIP is now understood as a pleiotropic neuromodulator with roles in the immune system, circadian rhythm regulation, reproductive function, and multiple neural circuits. It is found throughout the nervous system and peripheral organs.
VIP signals through two GPCRs: VPAC1 and VPAC2 (previously VIP1R and VIP2R). VPAC1 is expressed broadly including in lymphocytes, lung, intestine, and liver. VPAC2 is more restricted, with prominent expression in T-cells, the suprachiasmatic nucleus (the circadian clock), and several brain regions. VPAC receptor activation elevates cAMP, producing the downstream effects characteristic of VIP signaling: smooth muscle relaxation (including bronchodilation and vasodilation), neurotrophin production, anti-inflammatory cytokine shifts, and inhibition of T-cell proliferation. VIP is one of the most potent endogenous anti-inflammatory peptides studied.
Clinical interest in VIP has focused on: inflammatory diseases (VIP shifts immunity toward anti-inflammatory Th2/Treg phenotypes), pulmonary arterial hypertension (bronchodilation, vasodilation), and circadian biology (VIP neurons in the suprachiasmatic nucleus are required for circadian rhythm generation and synchronization).
Specifications
| Parameter | Value |
|---|---|
| Compound | Vasoactive Intestinal Peptide (VIP), 28 amino acids |
| Purity | 99.3% avg (HPLC verified) |
| Format | Lyophilized powder |
| Reconstitution | Sterile water or saline |
| Storage | -20°C; 2-8°C after reconstitution, protect from light |
Storage
Store at -20°C and protect from light. Refrigerate at 2-8°C after reconstitution and use within 14 days. VIP is a relatively fragile peptide -- minimize handling time and exposure to elevated temperature after reconstitution.
What are VIP's main anti-inflammatory mechanisms?
VIP inhibits innate and adaptive immune responses through multiple mechanisms. It reduces macrophage and dendritic cell production of pro-inflammatory cytokines (TNF-alpha, IL-6, IL-12) while increasing anti-inflammatory cytokines (IL-10). In T-cells, VIP inhibits Th1 and Th17 differentiation (pro-inflammatory phenotypes) and promotes Treg and Th2 differentiation (anti-inflammatory phenotypes). It also inhibits NK cell cytotoxicity and reduces neutrophil function. These broad anti-inflammatory effects make VIP one of the most immunomodulatory peptides studied and have driven interest in VIP-based treatments for autoimmune diseases.
How does VIP regulate circadian rhythms?
VIP is the primary neurotransmitter of the suprachiasmatic nucleus (SCN), the brain's master circadian clock. VIP neurons in the SCN synchronize individual cellular clocks within the nucleus and are essential for maintaining coherent circadian oscillations across the network of clock cells. VPAC2 receptors on SCN neurons receive VIP signals to synchronize their molecular clock cycles. VIP also helps the SCN respond to light signals that reset the clock daily. Mice lacking VIP or VPAC2 lose circadian behavioral rhythms, demonstrating VIP's essential role in circadian timekeeping.
What conditions are being studied with VIP in clinical research?
VIP has been studied clinically in pulmonary arterial hypertension (where vasodilation and anti-proliferative effects on pulmonary vasculature are relevant), inflammatory bowel disease, and autoimmune conditions including rheumatoid arthritis. Inhaled VIP was studied in PAH with mixed results. The short half-life of native VIP (minutes) is a challenge for systemic use, and modified longer-acting VIP analogues are being developed. In research contexts, the immunological and circadian biology applications are particularly active areas.
VIP is supplied for laboratory research use only. Not approved for unsanctioned human use. Handle in compliance with institutional biosafety guidelines.
Specification Summary
Purity99.3% avg
FormLyophilized Powder
Storage-20\u00B0C
Researcher Confidence
Why researchers choose CertaPeptides
Who actually tests this?
Every batch is independently verified by Janoshik Analytical (100,000+ verifications/month), Eurofins Scientific, and Analytical Sciences International. We publish every Certificate of Analysis.
View COAs →What if I get the wrong batch?
Every bottle label carries a lot number that maps to a specific Certificate of Analysis. If a batch fails spec, we don't ship it — full stop.
View COAs →Where does it ship from?
Romania (EU). We are CERTALAB SRL, CUI RO54451735, VAT-registered. SameDay for Romania, FanCourier for Central/Eastern EU, TCE Worldwide for the rest. 3–7 business days EU-wide.
Shipping details →What if there's a problem?
You have a 14-day withdrawal right under OUG 34/2014 (Romanian/EU consumer law), with ANPC/ODR escalation available. Contact us at support@certapeptides.com.
Returns policy →Product Information
This product is intended for scientific research and development purposes only. It is a chemical substance that shall not be used as a drug, medicine, active substance, or ingredient in any product intended for human or animal consumption. Researchers must handle this compound in accordance with their institutional biosafety guidelines. Use only in properly equipped laboratory settings with appropriate personal protective equipment.
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