Search for “VIP peptide” and you may also encounter names such as Vasoactive Intestinal Peptide, Vasoactive Intestinal Polypeptide and Aviptadil. For professional buyers, that creates an important question: are all products carrying those names analytically identical?
For laboratories and biotechnology companies sourcing VIP research peptide, the product name should be the beginning of verification — not the end.
What Is Vasoactive Intestinal Peptide?
Vasoactive Intestinal Peptide (VIP, CAS 37221-79-7) is a naturally occurring 28-amino-acid neuropeptide.
Its sequence is:
HSDAVFTDNYTRLRKQMAVKKYLNSILN
VIP has been widely investigated in laboratory research involving:
- VPAC1 and VPAC2 receptor signaling;
- neuropeptide biology;
- gastrointestinal signaling;
- cellular communication;
- immune-related pathways;
- vasodilation mechanisms.
Its broad biological activity makes VIP an important reference peptide for receptor and signaling research.
VIP vs. Aviptadil: Why Buyers Should Check the Details
The terms VIP and Aviptadil are often used closely together in online databases and supplier pages.
However, chemical databases may list different registry identifiers or terminal forms depending on how the substance is defined.
For example, Vasoactive Intestinal Peptide is commonly associated with CAS 37221-79-7, while Aviptadil may appear under a different CAS registration.
For researchers, this means one rule matters:
Do not rely on the product name alone.
Confirm:
- peptide sequence;
- molecular form;
- CAS or registry information;
- molecular weight;
- batch-specific identity data.
What Do VIP Peptide Reviews Say?
Online experiences involving VIP are mixed.
Some users describe perceived improvements involving energy, brain fog or general well-being.
Others report little benefit or unwanted reactions.
Published human studies involving aviptadil have also reported effects such as:
- diarrhea;
- facial flushing;
- changes in blood pressure;
- tachycardia.
These observations should not be interpreted as evidence that research-grade VIP is safe or effective for personal use.
For professional laboratories, controlled data and analytical documentation are more useful than anecdotal reviews.
Choosing a VIP Peptide Supplier: What Should B2B Buyers Verify?
1. Confirm the Sequence
Human VIP is a 28-amino-acid peptide.
The supplied material should match the expected sequence and molecular specification.
2. Review HPLC Purity
VIP HPLC purity provides information about chromatographic purity and peptide-related impurities.
However:
HPLC purity alone does not independently confirm molecular identity.
3. Request Identity Data
Where applicable, LC-MS or mass spectrometry can provide additional support for peptide identity.
For a peptide with multiple naming conventions, this step is particularly valuable.
4. Check the Batch-Specific COA
A professional VIP Certificate of Analysis should correspond to the lot actually being supplied.
Depending on research requirements, buyers may consider reviewing:
- HPLC purity;
- identity data;
- peptide sequence;
- molecular weight;
- lot number;
- product specification;
- SDS;
- storage conditions.
VIP Research Peptide from Sunone
Sunone (Hong Kong) Biopharmaceutical International Technology Co., Limited supplies Vasoactive Intestinal Peptide for qualified laboratory research and manufacturing applications.
Current product information includes:
Product: VIP — Vasoactive Intestinal Peptide
CAS: 37221-79-7
Sequence Length: 28 amino acids
Sequence: HSDAVFTDNYTRLRKQMAVKKYLNSILN
Molecular Weight: 3326.8 g/mol
Grade: Research Grade
Purity: ≥99% by HPLC
Form: Lyophilized Powder
Documentation: COA, SDS and Specification Sheet available
Looking for a VIP research peptide supplier, analytical documentation or B2B quantities?
View VIP Specifications ：
Send Sunone your required quantity, packaging, specification and analytical-documentation requirements for a B2B quotation.
VIP Peptide FAQ
What does VIP stand for?
VIP stands for Vasoactive Intestinal Peptide, also historically called Vasoactive Intestinal Polypeptide.
What is the CAS number for Vasoactive Intestinal Peptide?
Vasoactive Intestinal Peptide is commonly indexed under CAS 37221-79-7.
Is VIP the same as Aviptadil?
The names are closely related in scientific and pharmaceutical databases, but registry identifiers and chemical definitions can differ. Professional buyers should verify the exact sequence, chemical form and batch documentation rather than relying on synonyms alone.
What should buyers request from a VIP peptide supplier?
Professional buyers may consider requesting batch-specific COA, HPLC purity, identity data such as LC-MS where applicable, sequence information, SDS and lot traceability.
Where can I request VIP research peptide?
Qualified B2B buyers can review the Sunone VIP product page and submit their required quantity and specifications for quotation.
This content is provided for scientific and educational purposes only. SUNONE research peptide is for qualified labrtorynt, diagnois, druc tor mmatct or veteimant, use.research only, Not for human consumption, clinical treame. Purchasers are responsible for complying with applicable laws and regulations in their jurisdiction.
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