Turmeric (C. longa) has many biological activities, such as the antioxidant properties demonstrated by Zaeoung, Anuchit, and Ni-wat (2005)andSingh et al. (2010).Zjalic et al. (2006) and Kim et al. (2008) showed that aflatoxins biosynthesis is related to oxidative stress and peroxidation of fungal cells. These studies showed an ability of phenolic compounds to inhibit lipid peroxidation without changes in growth or primary metabolism. Thus, the antioxidant property of C. longa could be important to the inhibition of aflatoxin production.