Abstract
The aim of this experiment was to study portal absorption of calcium in the growing pig after ingestion of extrinsic labelled 45Ca milk (M), yoghurt (Y) or heat treated yoghurt (HY). Portal levels of 45Ca are high very soon (15 min) after ingestion of M, Y and HY and decrease after 60 min. An absorption peak was observed at 30 min for M and HY and at 60 min for Y. The highest porto-arterial differences were observed between 15 and 60 min for each milk product, indicating that absorption mainly occurs during the first hour postprandial (about 50% for M, 44% for Y and 42% for HY). 45Ca portal absorption rate is close to 80% for the three dairy products, suggesting that M, Y and HY deliver nearly the same amounts of 45Ca to the organism.
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