Researchers sourcing VIP for preclinical studies need a supplier that understands the analytical requirements for a twenty eight amino acid neuropeptide with relatively demanding synthesis and storage considerations. VIP has broad research applications across vascular, immune, neural, and circadian biology, and research grade supply has to support the diverse research contexts with consistent quality. This guide covers supplier evaluation criteria and shows how Midwest Peptide meets those criteria.
Where to Buy VIP (Vasoactive Intestinal Peptide) for Research: Sourcing Guide
VIP · Published April 14, 2026 · Updated May 18, 2026 · 7 min read
Quick Answer
Researchers source VIP peptide from suppliers providing documented Certificate of Analysis, HPLC purity verification, and lot traceability for this 28-amino-acid neuropeptide. This guide covers vendor evaluation and how Midwest Peptide VIP meets research-grade specifications for VPAC receptor and neuroscience research. For research use only, not for human consumption.
Research Use Only. All products are strictly for research use only (RUO). Not for human consumption. Products on this site are not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA. By purchasing, you agree that you are a qualified researcher and that products will be used solely for in-vitro research purposes.
- Recent Peer-Reviewed Research on VIP Biology
- What Research Grade VIP Supply Requires
- Sourcing Criteria for Research Grade VIP
- Red Flags When Evaluating VIP Suppliers
- What VIP Is Studied For in Research
- Frequently Asked Sourcing Questions
- External Research Resources
- Related Research Reading
- Shop VIP at Midwest Peptide
- Related Research Articles
- Explore Related Products
- Frequently Asked Questions
- Glossary
Frequently Asked Questions
What is VIP in research contexts?
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VIP (vasoactive intestinal peptide) is an endogenous 28-amino-acid neuropeptide of the secretin/glucagon superfamily. It is studied in preclinical models for vasodilation, immune modulation, circadian rhythm regulation, and pulmonary smooth muscle research through VPAC1 and VPAC2 receptor signaling.
What should researchers verify when sourcing VIP?
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Verify HPLC purity above 98%, mass spec identity confirming the 28-amino-acid sequence, peptide content quantification, endotoxin testing, and a recent batch-specific COA. Stability data is essential for the lyophilized form of this longer neuropeptide.
Where can research labs source verified VIP?
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Midwest Peptide supplies research-grade VIP with comprehensive COA documentation, HPLC purity verification, mass spec identity confirmation of the 28-amino-acid sequence, and lot tracking for reproducible vasoactive intestinal peptide research.
Is VIP approved for human use?
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No. VIP is not approved by the FDA for any human therapeutic use. It is supplied strictly for in-vitro and preclinical research purposes by qualified investigators.
Glossary
Key terms used in this article.
- VPAC1
- Vasoactive intestinal peptide receptor 1, broadly distributed, mediating immune and gastrointestinal effects of VIP.
- VPAC2
- Vasoactive intestinal peptide receptor 2, enriched in the suprachiasmatic nucleus and lung, involved in circadian and pulmonary signaling.
- Suprachiasmatic Nucleus (SCN)
- The hypothalamic master circadian pacemaker, where VPAC2 signaling is essential for synchronizing rhythmic neuronal activity.
- Vasodilation
- Widening of blood vessels resulting from relaxation of vascular smooth muscle, often mediated by nitric oxide or VIP signaling.
- Neuropeptide
- A peptide produced and released by neurons that acts as a signaling molecule in the nervous system.
- 28-Amino-Acid Peptide
- A peptide chain composed of 28 residues, the length of vasoactive intestinal peptide.
- Lyophilized Form
- The freeze-dried solid form of a peptide, more stable than reconstituted solution and suitable for long-term cold storage.
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Research Use Only. All products are strictly for research use only (RUO). Not for human consumption. Products on this site are not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA. By purchasing, you agree that you are a qualified researcher and that products will be used solely for in-vitro research purposes.
