Lysine is an essential amino acid for dairy cows, helping boost milk production when added to the diet at adequate levels. But could lysine benefit cows in other ways? A new University of Illinois study shows rumen-protected lysine can improve uterine health if fed during the transition period. The study, "Effect of feeding rumen-protected lysine through the transition period on postpartum uterine health of dairy cows," is published in the Journal of Dairy Science.