Heredity transmits defects in the way the body produces or uses cholesterol; the blood fat that can

CANADA - MAY 02: Heredity transmits defects in the way the body produces or uses cholesterol; the blood fat that can clog arteries and cause strokes. Bev Nisenboim takes her sons Shawn and Eliot - who have; like her; a cholesterol condition - to the Lipid Clinic at St. Michael's Hospital for blood tests from technician Teresa Lippingwell. The clinic was the first in Canada to treat outpatients for abnormal levels of blood fat. (Photo by Reg Innell/Toronto Star via Getty Images)