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Abstract
The nutritive utilization of calcium, phosphorus and magnesium was studied in adult rats in which 50% of the distal small intestine (DSI) had been resected and in sham-operated controls one month and three months after the operation. Resection of half the DSI reduced the digestive utilization of Ca, P. and Mg as reflected by mineral content in bone. Three months after resection, nutritive utilizatíon of Ca had still not recovered; in contrast digestive utilization of P and nutritive utilization of Mg were seen to recover by three months postsurgery. When dietary fat was supplied as equal parts of medium chain triglycerides, sunflower seed oil and olive oil instead of 100% olive oil, additionate of ursodeoxycholic acid, P and Mg absorption were enhanced in resected rats after one month. After a period of three months during which resected rats were given the same diet, digestive and metabolic utilization of Ca improve. In relation to P, the better nutritive utilization found one month after resection is more notable at three months.
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