CAT and Alzheimer disease: The following section highlights potential therapeutics for AD in preclinical (catalase, N-acetylcysteine, Coenzyme Q10, melatonin, exenatide, metformin, carnosine, clove, berberine, ligstroside and oleuroside, Egb761, quercetin, dihydroxyflavone, nilotinib, rapamycin, resveratrol, Aβ3-10-KLH vaccine, and olesoxime), and clinical models (vitamin C and E, alfa-lipoic acid, thiazolidinediones, curcumin, lithium, and small peptide SS-31).