Brain Energy: A Revolutionary Breakthrough in Understanding Mental Health—and Improving Treatment for Anxiety, Depression, OCD, PTSD, and More

by Christopher M. Palmer

This gene codes for a protein, Apolipoprotein E, that is related to fat and cholesterol transportation and metabolism. The gene comes in three forms: APOE2, APOE3, and APOE4. About 25 percent of people carry one copy of APOE4, and 2 to 3 percent have two copies. Those with one copy are three to four times more likely to develop Alzheimer’s,