The expression of MTOR was greater in liver of cows in CON compared with cows in POS (P = 0.04; POS vs. CON). A quadratic treatment effect occurred for GLUD1 expression in liver of cows as adsorbent concentration increased in the diet (P = 0.04). There was a positive linear trend for haptoglobin expression in liver of cows as adsorbent concentration increased in the diet (P = 0.10).