does cigarette smoking cause lung cancer What You Need to Know About and How Quitting Smoking Lowers Lung

The American Heart Association states that nicotine, whether it is vaped or smoked, restricts blood flow to the gums, and therefore, causes an increased risk of gum disease

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By using a genetic variant associated with smoking heaviness as a proxy for smoking heaviness, bias from confounding is minimised and findings not affected by reverse causality

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