Clinical and basic studies have confirmed that DH can reduce Aβ deposition in the AD brain, lower the levels of cytokines and inflammatory factors, increase the activities of catalase (CAT) and glutathione peroxidase (GSH-Px) to relieve oxidative stress response, repair the morphological structure of hippocampal neurons, and alleviate the loss of neurons [11,12]. This evidence concerns the gene CAT and Alzheimer disease.