Quercetin:Reduces the rate of apoptosis in AD cells significantly better than other compounds.Increases the expression of genes related to AD, such as PP2A, GSK3, and NMDAR.Thymol:Shows anti-AD and antioxidant effects, increases cell survival rate, and reduces apoptosis rate. Both thymol and Thymus vulgaris essential oil significantly increase the expression of the PP2A gene. The gene discussed is PTPA; the disease is Alzheimer disease.