Milk Fat with Increased Polyunsaturated Fatty Acids

Abstract

Abstract Milk fat with increased polyunsaturated fatty acids was produced by feeding cows a diet containing a formaldehyde-treated safflower oil-casein particle. This treatment protected the linoleic acid of the safflower oil from hydrogenation in the rumen, and the linoleic acid content of the milk increased from 3% to 35% of the total fatty acids. Total milk production was not altered, but fat content of the milk increased 1.0 to 1.5 percentage units.