Meanwhile, other studies have shown that the active ingredient of tea, EGCG, can inhibit the aggregation of α-syn, Aβ, and huntingtin, as well as participating in the regulation of neuronal inflammatory processes and the activation of pro-neuronal survival signaling pathways, which can have a certain therapeutic effect in AD, PD, and HD [193,194,195]. Here, HTT is linked to Huntington disease.