Vasoactive Intestinal Peptide (VIP) is a neuropeptide that functions as a potent vasodilator, enhancing blood flow to vital organs and tissues. It also acts as a neurotransmitter, modulating neuronal signaling and synaptic transmission. Moreover, VIP influences immune responses, exerting immunomodulatory effects on various immune cells.
Research suggests that VIP is involved in the regulation of gastrointestinal motility, secretion, and absorption, promoting digestive health. Additionally, it has been implicated in the regulation of circadian rhythms, sleep-wake cycles, and the modulation of pain perception.