The predominant fatty acids (FA )in cow’s milk are the long chain fatty acids (LCFA); myristic (14:0), palmitic (16:0) and stearic (18:0).These fatty acids are believed to elevate serum concentrations of cholesterol and low density lipoprotein cholesterol which increase the risk of cardio-vascular diseases in humans (Mansbridge and Blake, 1997). Ruminal metabolism of Fas greatly influence
milk FA profile of dairy cows.