A serum‐based panel with six proteins, including brain‐derived neurotrophic factor, insulin‐like growth factor 1, vascular endothelial growth factor, transforming growth factor‐beta type 1 (TGF‐β1), monocyte chemoattractant protein 1, and IL‐18, could differentiate subjects with AD from the detected cohorts with great accuracy (AUC = 0.85).99 Here, IL18 is linked to Alzheimer disease.