Washington: When exposed to secondhand smoke at home, teenage girls tend to have lower levels of the "good" form of cholesterol that reduces heart disease risk, according to a recent study.High-density lipoproteins (HDL) pick up excess cholesterol in the blood stream and take it to the liver where it can be broken down. Unlike low-density lipoproteins that can create a waxy build-up that blocks blood vessels, HDL cholesterol can play a key role in combatting heart disease risk."In our study, we found 17-year-old girls raised in households where passive smoking occurred were more likely to experience declines in HDL cholesterol levels," said the study`s lead author, Chi Le-Ha, MD, of the University of Western Australia.
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