You must be 21 years or older to access this website. All products are for research use only.
Are you 21 years of age or older?
By entering, you confirm that you are at least 21 years old and agree to our terms of service.

SKU: VIP
Order before 2 PM CT — ships same business day
Volume Discount
8% off
$150+ cart
12% off
$250+ cart
18% off
$400+ cart
VIP is a 28-amino acid endogenous peptide primarily studied for its potent vasodilatory and immunomodulatory properties. In laboratory research, it is investigated for its role in regulating biological rhythms, reducing systemic inflammation, and its protective effects on pulmonary and neurological tissues.
Third-Party Tested
Independent lab verification
COA Available
Certificate of Analysis included
Free Shipping
On all domestic orders
Research Use Only
For laboratory research purposes
VIP is a naturally occurring neuropeptide composed of 28 amino acids. Each vial contains 10mg of lyophilized VIP for research purposes only. Third-party tested with Certificate of Analysis (COA) available. Purity: >99%.
VIP (Vasoactive Intestinal Peptide) is a naturally occurring neuropeptide composed of 28 amino acids, extensively studied for its role in cell signaling, vasodilation, and immune regulation.
In vitro, VIP has been investigated for its interaction with VPAC1 and VPAC2 receptors, which are associated with smooth muscle relaxation, anti-inflammatory activity, and modulation of cytokine expression. It has also been explored for its potential neuroprotective and metabolic-regulatory functions in various research models.
VIP is studied in vitro for its potential roles in:
This compound is intended strictly for in vitro laboratory research. It is not approved for human or animal administration and must not be used in food, dietary supplements, cosmetics, or pharmaceuticals.
This product and related information have not been evaluated by the U.S. Food and Drug Administration. No claims are made regarding diagnosis, treatment, cure, or prevention of any disease. Use is restricted to qualified research professionals in certified laboratory environments.
By purchasing from Midwest Peptide, the buyer affirms they are a qualified researcher or institution, fully responsible for lawful handling, storage, and research use of this material. All sales are final.
VIP (Vasoactive Intestinal Peptide) is a 28-amino-acid endogenous neuropeptide that activates the VPAC1 and VPAC2 G-protein-coupled receptors. In research it is studied for vasodilation, immunomodulation, circadian regulation, and gastrointestinal motility pathway research. Supplied strictly for Research Use Only.
VIP is studied in preclinical research on vasodilatory mechanisms, anti-inflammatory cytokine profiles, suprachiasmatic nucleus circadian signaling, and gastrointestinal smooth muscle research. All cited studies are conducted in cellular or rodent systems consistent with the molecule's RUO classification.
VIP is a naturally occurring (endogenous) peptide first isolated from intestinal tissue. The product supplied here is a synthetic version produced via solid-phase peptide synthesis with the same 28-residue sequence as the native molecule.
Other research peptides in this category
Research articles and insights related to VIP

VIP bone and cartilage research covering osteoblast biology, osteoclast modulation, chondrocyte effects, and osteoporosis and arthritis model research. For research use only.
April 24, 2026

VIP gastrointestinal research covering gut motility regulation, inflammatory bowel disease models, intestinal secretion, and enteric nervous system biology. For research use only.
April 24, 2026

VIP immune modulation research covering T cell cytokine profile shifts, regulatory T cell induction, macrophage polarization, and autoimmune disease model findings. For research use only.
April 14, 2026

VIP vasoactive intestinal peptide sourcing guide covering supplier evaluation for a twenty eight amino acid neuropeptide and the Midwest Peptide catalog. For research use only.
April 14, 2026
Research Use Only. These products are not supplements, drugs, or intended for human or veterinary use. These products are for laboratory research purposes only. All product information available on this website is for educational purposes only. The products offered on this website are not intended to diagnose, treat, cure, or prevent any disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This material is sold for in-vitro research purposes only.
Add $85.01 more to save 8% off
Research Use Only. This product is intended solely for laboratory research purposes. Not for human or veterinary use. Not for food or cosmetic use. By purchasing, the buyer agrees to use this product only for research applications.
Every batch of VIP ships with a third-party COA verifying purity by HPLC (>=99%), identity by mass spectrometry, and lyophilized mass. The batch-specific COA is published on this product page before purchase.
Lyophilized VIP is stored at -20C for long-term storage and 2-8C for short-term use within 30 days. Avoid repeated freeze-thaw cycles. Store in original sealed vials, protected from light.
VIP is not FDA-approved as a therapeutic. The product supplied here is for laboratory and research use only and is not approved for diagnostic, therapeutic, or human use.