THE COMMON EXPLANATION:
You really can blame your parents for this one: Male pattern baldness is caused by your genes and sex hormones. It happens when the hair follicle shrinks over time, resulting in shorter and finer strands—and then no hair at all.
THE BIGGER PROBLEM:
In a new study from the University of Copenhagen, researchers found that men with receding hairlines had a 57 percent increased risk for heart attack and a 39 percent increased risk for heart disease. Earlobe creases and fatty deposits around the eye were other tell-tale risk indicators. If your hairline creeps, talk to your doctor about strategies to maintain good heart health, like exercising regularly, not smoking, and avoiding saturated fats.