2002b. Dietary linseed oil produces lower abdominal fat deposition but higher de novo fatty acid synthesis in broiler chickens

ABSTRACT Previous experiments have shown lower abdominal and body fat deposition in broilers fed polyun-saturated fatty acids (PUFA) compared with those fed saturated fatty acids (SFA) or monounsaturated fatty acids (MUFA). These changes in fat deposition may be related to different rates of lipid synthesis or lipid oxida-tion. In Experiment 1, in vivo lipogenesis of broilers fed different dietary fatty acid profiles (tallow, sunflower oil, or linseed oil) was investigated. In Experiment 2, liver fatty acid deposition of broilers fed a basal diet (without additional fat) or diets with added tallow, olive oil, sun-flower oil, or linseed oil was studied. Results from Experi-ment 1 showed higher rates of de novo fatty acid synthesis (Key words: broiler, dietary fatty acid profile, in vivo lipogenesis, liver fatty acid