In combination with ciprofloxacin, it can enhance the antioxidant effect of ciprofloxacin and reduce its toxic effect, which may provide potential benefits against AD by regulating ferroptosis.578 A polycatechol composed of dopamine and L-Dopa can isolate the unstable iron pool, scavenge free radicals, protect mitochondria, and prevent ferroptosis, while inhibiting Aβ and tau protein aggregation to save neuronal cell death. This evidence concerns the gene MAPT and Alzheimer disease.