Keeping weight off may be stymied by fat cells’ ‘memory’ of obesity
Some genetic changes in fat cells don’t go away after weight loss

A new study suggests that adipose tissue, which contains fat cells (shown red-yellow in this scanning electron micrograph), can carry a genetic “memory” of obesity that may make it harder to keep weight off.
STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY/GETTY IMAGES