American Academy of Neurology Apr 8 2026 Eating a higher quality plant-based diet is associated with a lower risk of Alzheimer's disease and other related dementias compared to eating a lower quality plant-based diet, according to a study published April 8, 2026, in  Neurology ® , the medical journal of the American Academy of Neurology. While the study shows an association based on observations, it does not prove that a higher quality plant-based diet causes a lower risk of dementia.