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To replace cigarettes, electronic cigarettes were created

Diagnostics 2 min read Even one cigarette a day ups heart disease, stroke risk: study London: Smoking just one cigarette a day carries nearly half the risk for developing coronary heart disease and stroke as puffing 20 cigarettes per day, warns a study published in the British Medical Journal

Metabolism is the energy that's needed for our body to function from breathing, to running, to exercise, everything, says Marcio Griebeler, MD, an endocrinologist and obesity specialist with the Cleveland Clinic's endocrinology and metabolism institute in Avon, Ohio

The smoke itself is made up of tiny particles (often less than one micron in size) that float around in the air without settling, eventually finding their way to every corner of the room