Vasoactive intestinal polypeptide

Vasoactive intestinal polypeptide (VIP) is a substance found throughout the body, but the highest levels normally occur in the nervous system and gut. VIP has many functions:

• It helps control or send nerve signals
• It helps relax certain muscles along the gastrointestinal tract
• It increases the amount of water and electrolytes released from the pancreas and gut
• It triggers the release of hormones from the pancreas, gut, and hypothalamus
• It helps breakdown fat and glycogen
• It stimulates bile flow
• It blocks gastrin and gastric acid secretion

A blood test can be done to find out how much VIP you have in your blood.