These 30 Remarkable Body Features Are Very Rare…and Fascinating

This genetic deficiency keeps heart disease at bay.

A gene called Proprotein convertase subtilisin/Kexin type 9 (PCSK9) exists in all of us. (And its name doesn’t exactly roll off the tongue.)

However, a small subset of the population has less PCSK9 than most people, which also happens to put them at lower risk for cardiovascular disease.