Fig 1. Effect of prepartum control or conjugated linoleic acids (CLA) supplementation on serum fatty acids (FA) at first day of supplementation and 10 days prepartum, and at 1, 7, 14, and 30 days postpartum in dairy cows.

Treatments: Control (open bar, n = 34) cows supplemented with 78 g of Energy Booster 100 (Milk Specialties Global, Eden Prairie, MN) and CLA (closed bar, n = 30) cows supplemented with 100 g/day of Lutrell Pure (BASF, Ludwigshafen, Germany). Supplementation was by individual topdress of product mixed with 200 g corn gluten feed for 16 days prepartum. * P ≤ 0.05 for treatment differences within individual timepoint. Overall treatment effect P = 0.06. Interaction treatment x time P = 0.02.