But other types of cholesterol drugs might help, he added.
Drugs known as bile acid sequestrants and cholesterol absorption inhibitors can be used along with statins, according to the U.S National Heart, Lung, and Blood Institute.
For her part, Narula said, "Cardiovascular disease is the No. 1 killer in this country. Our ability to treat high cholesterol is one of the great tools we have against it."
The study was funded by government and private grants. Turchin has received research funds from Merck, which makes Zocor and Mevacor.
Learn more about high cholesterol from the U.S. National Heart, Lung, and Blood Institute.
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