Figure VIII.1 shows the relationship between growth performance and curcumin in the diet for Exp. I. The control diet (0 intake) in this experiment contained no antibiotics or zinc. Based on the results there is a strong quadratic increase growth performance with increasing curcumin supplementation (R2 > 0.975). Therefore, the level of curcumin to maximize growth performance of nursery pigs in Exp. 1 was between 47 and 94 mg/kg.