The Web MD take...the exact opposite. Can Low Cholesterol Keep Your Brain Healthy? Written by Gina Shaw Medically Reviewed by Arefa Cassoobhoy, MD, MPH on April 25, 2014 https://www.webmd.com/cholesterol-management/features/can-low-cholesterol-keep-your-brain-healthy What's clear, DeCarli says, is that if you're at risk for heart disease because your cholesterol levels aren't right, you have one more reason not to ignore the numbers. Your risk of Alzheimer’s might be less after cholesterol treatment.