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Effects on the brain Smoking: Nicotine changes the brain chemistry, making nicotine addiction hard to beat

Causey, MD Medical Reviewer Katherine Lee Author Katherine Lee is a writer and editor who specializes in health, science, and parenting content

Is Smoking a Cigarette Bad for You

10.1089/jwh.2010.2075 Kume A, Kume T, Masuda K, Shibuya F, Yamazaki H: Dose-dependent effects of cigarette smoke on blood biomarkers in healthy Japanese volunteers: observations from smoking and non-smoking

For example, some studies suggest that people whose mothers smoked during pregnancy are more likely to smoke themselves and that maternal smoking might increase testosterone levels in sons