Effect of the NAF from black soybean seed coat on AChE activity (A) and lipid peroxidation (B) from Aβ-induced mice brain homogenate. Control group was injected with saline (0.85%). Aβ1-40 was injected with 410 pmol of Aβ1-40 per mouse. Sample groups (NAF5, NAF10, and NAF20) were injected with Aβ1-40 followed by feeding with the NAF (5, 10, 20 mg/kg per day, respectively). Bar graphs were represented with the mean ± SD (n = 8) (p < 0.05 versus control group, p < 0.05 versus Aβ group). Different superscripts indicate significant difference among groups at p < 0.05.