VIP (Vasoactive Intestinal Peptide)

VIP is a naturally occurring peptide involved in signaling across several organ systems. It has been investigated in relation to inflammatory processes, nervous system function, airway physiology, and vascular regulation, but the supplied notes do not establish therapeutic benefit.

VIP was first identified in intestinal tissue and is also found in neural, pulmonary, immune, and cardiovascular tissues. Its broad distribution is consistent with roles in coordinating immune activity, smooth muscle tone, and blood vessel function.

The guide discusses modulation of immune signaling and inflammatory activity as potential mechanisms of interest. It also highlights pathways associated with neuronal preservation, relaxation of airway and vascular smooth muscle, and endothelial function, without specifying molecular targets or supporting experimental details.

1. 01

   Molecular target

2. 02

   Cellular signal

3. 03

   Biological process

LEVEL 01 · Basic biology

A biological mechanism or molecular interaction is described. No claim about human outcomes.

Evidence levels reflect the state of documented research only. They are not rankings of popularity, quality or suitability, and a higher level never implies that a compound is an approved medicine.

The source guide presents VIP as a peptide with potential relevance to immune, pulmonary, neurological, and cardiovascular research. It links these areas to possible applications in inflammatory disorders, respiratory conditions, cognitive function, and vascular health. The guide also characterizes tolerability favorably, although the extracted material provides no supporting study details.

Source: The Complete Guide to Peptides: Unlocking the Secrets to Health, Healing and Longevity — Hack Smith, Chapter 6, Introduction to Peptides (page references not verified)

Summarised in our own wording from the cited reference. The reference is a popular guide, not peer-reviewed literature; its statements are reported here as source claims rather than established facts.

Dosage, reconstitution and administration guidance is deliberately excluded from this platform.

The notes do not distinguish established physiological functions from experimental therapeutic hypotheses or identify the maturity of the supporting evidence. Claims concerning cognitive improvement, disease management, and overall tolerability therefore remain insufficiently substantiated.

Safety data are limited in the supplied material; the guide mentions flushing, dizziness, temporary reductions in blood pressure, and localized nasal irritation as possible adverse effects. Cardiovascular conditions, abnormal blood pressure, or altered immune function may warrant particular clinical scrutiny. This information is not medical advice.

Research-stage compound unless otherwise established by a competent authority. Regulatory classification differs between jurisdictions and can change over time; nothing here indicates marketing authorisation.

Primary reference for this entry:

The Complete Guide to Peptides: Unlocking the Secrets to Health, Healing and Longevity — Hack Smith, Chapter 6, Introduction to Peptides (page references not verified)

Suggested literature search terms taken from the source. They are search starting points, not citations to specific studies.

• “Vasoactive intestinal peptide (VIP) immune modulation”
• “VIP peptide in respiratory conditions”
• “Vasoactive intestinal peptide (VIP) for neuroprotection”

Editorial status

source reviewed

Last updated

2026-09-14

Last reviewed

2026-09-13

Language

EN