Of the markers tested in this study Aβ, oligomeric amyloid, total tau, p‐tau181, p‐tau231, p‐tau217, p‐tauS235, p‐tauS202‐T205, LAMP1, ubiquitin, and alpha‐synuclein all accurately distinguished MCI and/or AD diagnostic categories. Here, LAMP1 is linked to Alzheimer disease.