Lipoprotein (a), a form of cholesterol, appears to increase the risk of heart attack two- to threefold in people with the highest levels of the protein, Danish researchers reported. People have little control over the protein, and some patients do not respond to cholesterol-lowering drugs, or statins, because those on the market work by lowering low-density lipoprotein. The study's lead author said he hopes the findings will encourage drug companies to develop medicines that target lipoprotein (a).

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