This study aimed to examine relationships among eating frequency, timing and time window, and cognitive performance and novel Alzheimer disease (AD) biomarkers in cognitively healthy and mildly cognitively impaired middle-aged and older adults. It concluded that an eating pattern characterized by less frequent eating and/or by earlier times is present in individuals with worse cognitive performance. The results shed light on the relevance of temporal eating patterns as potential early markers of behavioral or metabolic changes related to AD pathology.