04 Lipid Metabolic Disorders

04 Lipid Metabolic Disorders - LipidUseandMetabolic...

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Lipid Use and Metabolic  Disorders
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Fatty Acid Profile Major fatty acids in feed fats C16:0 Palmitic acid C16:1 Palmitoleic acid C18:0 Stearic acid C18:1 Oleic acid C18:2 Linoleic acid C18:3 Linolen ic acid Unsaturated:saturated ratio = C16:1 + C18:1 + C18:2 + C18:3   C16:0 + C18:0
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Types of Feed Fats and Oils Oils Vegetable oils Soapstocks = FA + salt ion (Na, K) Fats Tallow, lard Choice white grease Restaurant grease Blends Oils + fats
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Fat Sources Oil sources Soapstock Vegetable oil Restaurant grease Fat sources Pig and cattle tissues from:   Slaughter plants, lockers Grocery stores Deadstock Age of oil/heat damage? % free fatty acids? Hydrogenated oil (trans fatty acids)? Variation due to  • U:S ratio • % free-fatty acids • Others Variation due to  • U:S ratio • % free-fatty acids • Others
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Age and Energy Values (Poults) Age (weeks) ME (kcal/lb) Fat digestibility increases with age Fat digestibility increases with age
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U:S Ratio and Energy Values Unsaturated:Saturated ratio ME (kcal/lb) 1) Saturated FA are not digested as well as unsaturated FA 1) Saturated FA are not digested as well as unsaturated FA
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U:S Ratio and Energy Values Unsaturated:Saturated Ratio ME (kcal/lb) Wiseman et al. (1991) 1) Saturated FA are not digested as well as unsaturated FA 2) The situation is worse for young animals 1) Saturated FA are not digested as well as unsaturated FA 2) The situation is worse for young animals Young Old
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Free Fatty Acids and  Energy Values 0 10 20 30 40 50 60 70 80 90 100 Free Fatty Acids (%) ME (kcal/lb) 1) FFA are not digested as well as TGs 2) The problem is worse in young animals 1) FFA are not digested as well as TGs 2) The problem is worse in young animals Old Young
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Heat Damage and Energy  Values Heating time at 360°F (hrs) ME (kcal/lb) Heat damage progressively reduces the feeding value of restaurant grease Heat damage progressively reduces the feeding value of restaurant grease
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This document was uploaded on 02/14/2012.

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04 Lipid Metabolic Disorders - LipidUseandMetabolic...

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