Comparison of effects of ingested mediumand long-chain triglyceride on gallbladder volume and release of cholecystokinin and other gut peptides

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Abstract
In a double-blind, crossover study of the effect of ingested medium-chain triglyceride (MCT) and long-chain triglyceride (LCT) in six normal subjects, the gallbladder did not contract after ingestion of MCT but instead had significantly increased in volume at 2 hr after the meal. Plasma cholecystokinin (CCK) increased after the MCT meal, but gastrin, motilin, pancreatic polypeptide (PP), and GIP were unaffected. The long-chain triglyceride meal evoked a brisk and sustained gallbladder contraction, higher levels of CCK, and a significant increase in plasma PP and GIP levels.