The expression of BDNF and CNTF was higher in the AD-RVT, AD-ZXT, and AD-LTN groups compared to the AD-CON group (p < 0.01 and p < 0.01), indicating that resveratrol, zeaxanthin, and lutein supplementation increased the expression of these factors in the AD rats (Table 1). Here, CNTF is linked to Alzheimer disease.