Abstract
Male Wistar rats were fed a purified basal diet with 20% lard and corn oil (3:1), sunflower oil, poppyseed oil, low-erucic rapeseed oil from Brassica napus, cultivar Tower, or mixtures of these oils, for 1 or 26 weeks. None of the hearts exhibited lipidosis at 1 week. At 26 weeks, the level of serum triglycerides was higher in rats fed the mixture of lard and corn oil than in those fed only vegetable oil, and the incidence of cardiac necrosis and fibrosis was higher in rats fed the rapeseed oil than in the other animals. Cardiac phospholipids in rats fed the rapeseed oil contained an elevated level of omega 3 docosahexaenoic acid, particularly in phosphatidylethanolamine. Poppyseed oil exhibited properties similar to those of sunflower oil, was absorbed as well as olive oil, and appeared to be a promising oil for human consumption.
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