Other natural products, such as Bletilla Striata15 [10], Sarcodon aspratus16 [169], Arenaria kansuensis17 [170], quercetin18 [171], chelerythrine19 [172], and bergenin20 [173] can all protect against PF through the Nrf2-dependent mechanism. The gene discussed is NFE2L2; the disease is pemphigus foliaceus.