how harmful is smoking one cigarette a day 🚭 Tobacco has no safe dose for the heart. 🚨 just generates nearly half the coronary risk of smoking 20. Cutting back doesn't protect the heart. Only One cigarette per day enough

But a biomarker of oxidative cell damage, along with two biomarkers related to cardiovascular disease risk, were not significantly different from those found in smokers

Publishing in the journal Science on Thursday, the researchers said the findings show a direct link between the number of cigarettes smoked in a lifetime and the number of mutations in the DNA of cancerous tumours

Studies indicate that smoking 1 cigarette daily doubles the risk of lung cancer compared to non-smokers

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We might assume that it must be one or the other