Absorption of thermoxidized fats. II. Influence of dietary alteration and fat level

Abstract

In this paper, the influence of dietary fat alteration and level upon digestibilities of total fat, unsaponifiable matter and non-altered fatty acids, is studied. 11 groups of Wistar rats were fed diets containing non-heated and thermoxidized olive oils. Analytical techniques previously studied were used for isolation and evaluation of non-absorbed lipids present in feces. The results obtained led to the following conclusions: - Digestibility of fat decreases with dietary fat alteration but it is independent of the dietary fat level. - The apparent absorption of non-altered fatty acids is affected by the dietary fat alteration. - Dietary fat alteration significantly contributes to increase excreted levels of unsaponifiable from endogenous sources.

Keywords

• diet
• digestibility
• fatty acid
• rat
• thermoxidized oil unsaponifiable