Kim et al. reported that topical application of ginsenosides Rh2 or Rh2 plus Rg3 significantly reduced the clinical skin severity scores, ear thickness, mast cell populations, and TNF-α and IL-4 expression in the skin lesions of mice with TNCB-sensitized AD [52], while IFNγ expression and IgE levels were not affected. Here, IFNG is linked to Alzheimer disease.