In the growing rats weighing between 70 and 300 g, when 20 % of the total daily energy intake consists either of ‘lard (with 36 % oleic acid) or sunflowerseed oil (with 61 % linoleic acid)’, lipogenesis, proteinogenesis, feed efficiency ratio and body compositions are identical. With the nutritional conditions used during these experiments, the occurrence of a high level of polyunsaturated fatty acids level in the diet cannot be considered as an exogenous factor able to modify the parameters studied.
Laurie acid feeding induced large alterations in mammary gland fatty acid secretion. It was highly incorported in milk triglycerides, suggesting that mammary gland was not able to efficiently regulate the qualitative aspects of medium-chain fatty acid secretion. These modifications in milk fatty acid secretion did not alter pup growth, lipogenesis balance or the classic parameters of the pup liver during the suckling period. Nevertheless, maternal lauric acid feeding induced important alterations in the qualitative aspects of pup lipogenesis before weaning.
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