NOTHING IS EVER SIMPLE WHEN IT COMES TO THE heart. First the big worry was a high cholesterol level. Then, it was discovered, cholesterol comes in two varieties, and the real question was whether one had more of the good type, HDL, rather than the bad kind, LDL. Now it appears that HDL itself contains a mix of both good and bad elements. What may really count in the development of heart disease, according to scientists at a meeting of the American Heart Association, is the amount of the HDL component, LpA-I. The more of this protective protein one has circulating...
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