GFAP and Alzheimer disease: Accordingly, we performed a cross-sectional, population-based study of the association between two of the dietary patterns most consistently linked to inflammation and brain health (Mediterranean diet and inflammatory potential of diet) [9,11] and selected serum biomarkers of AD (t-tau, p-tau181, Aβ-42/40 ratio, NfL, and GFAP) among cognitively healthy older adults.