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Smokers have worse quality diets than former smokers or non-smokers, a new research has found. According to a Biomed Central-led study, smokers consumed around 200 more calories a day, despite eating significantly smaller portions of food, than non-smokers or former smokers. The study was conducted by Jacqueline Vernarelli and R. Ross MacLean on 5293 American adults. Dr Vernarelli commented, "Smokers had diets that were high in energy density, meaning they consumed smaller amounts of food containing a greater number of calories. Non-smokers consumed more food which contained fewer calories."