Abstract
Feeding fat-added diets to farm animals is becoming a common practice (Herber and van Elswyk, 1996; Lopez-Bote et al., 1997), and also in human diets the use of fat supplements, particularly the consumption of polyunsaturated fatty acids, has been increased in recent years to reduce the risk of cardiovascular diseases and other afflictions (Simopoulos, 1991). Experimental data indicate that dietary fat may be an important factor in trace mineral metabolism (Lukaski and Johnson, 1992). However, the interactions between dietary fat and selenium as well as the influence of dietary fat on tissues selenium concentrations and also the influence of dietary fat on the metabolic fate of selenium in the body and the influence of dietary fat on selenium needs are largely unknown. The present study with laying hens was done to investigate whether dietary fat influences tissue selenium concentrations and the selenium metabolism.
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