ANG and Alzheimer disease: Regarding ANG levels in specific types of neurodegenerative diseases, serum ANG levels were not significantly different between healthy controls and patients with AD (p = 0.685, n = 225) [57, 58], ALS (p = 0.484, n = 638) [15–17], and PD (p = 0.72, n = 163) [16] (FigureS3).