Express.co.uk | Dementia UPDATE: Vegetable oil putting MILLIONS at risk of degenerative brain disease Express.co.uk The nutritionist and family physician explained the link between Alzheimer's, dementia and vegetable oil. She said: "Vegetable oil causes oxidative stress, which damages brain membranes and results in plaque building up on the brain. "We've seen in ... Vegetable oil increases your risk of dementia |