Dietary soya beans and kidney beans stimulate secretion of cholecystokininand pancreatic digestive enzymes in 400-day-old hooded-lister rats but only soya beans induce growth of the pancreas

The effects of age on cholecystokinin (CCK) release, pancreatic enzyme secr etion, and growth of the pancreas mediated by dietary kidney beans or soya beans were evaluated in trials with 30-, 90-, 250-, and 400-day-old rats. S oya beans increased blood CCK and caused hypersecretion of digestive enzyme s and rapid pancreatic growth in all rats. Kidney beans also elevated circu lating CCK and stimulated enzyme secretion. However, with 90-, 250-, and 40 0-day-old rats, the secretory responses were attenuated. Furthermore, kidne y beans did not induce pancreatic growth in 250- and 400-day-old rats.