How Methionine and Energy Affect Milk Fatty Acid Profiles

Methionine influences the synthesis of fatty acids in the mammary gland resulting in improvements in milk fat yield. In full lactation cows producing 50kgs/day, feeding Smartamine® M, not only improved milk protein but also milk fat percent (4.13% vs 3.87%) independently of the metabolizable energy level of the diet. The increase in milk fat was mediated through an increase in preformed and monounsaturated fatty acids while decreasing polyunsaturated fatty acids. Further analysis is ongoing to better understand the mechanism of action of methionine on milk fat synthesis.

Features Jorge Carneiro, Graduate Student, Universidade Federal do Parana, Brazil. Dr. Brian Sloan, Global Director of Ruminant Amino Acids and Protected Nutrient Business, Adisseo. Dr. Dan Luchini, Head of Ruminant R&D, Adisseo