Experimentally NA has been shown to have antilipolytic effects causing an immediate reduction in plasma NEFA when given postruminally .Niacin binds to the G-protein coupled receptor GPR109A causing inhibition of adenyl cyclase activity and a subsequent reduction of intracellular cyclic AMP leading to suppression of lipolysis.This receptor also has high affinity for BHBA a ketone that is of considerable interest in postpartum dairy cows due to the high prevalence of ketosis