Do I Drink Too Much? Human Biology, Genetics, and Alcohol

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Why does tolerance for alcohol differ so widely from person to person? Do genetic factors make alcoholism unavoidable in some people? Should we drink at all? This program searches for answers, following addiction expert Dr. John Marsden as he observes-and participates in-experiments that assess alcohol's neurological and physiological impact. After exploring basic chemical and evolutionary concepts, Marsden visits London's Institute of Psychiatry, where brain scans, genetic testing, and psychological profiling shed light on alcohol addiction. In the U.S., Marsden goes inside the National Institute on Alcohol Abuse and Alcoholism to study other genetic markers, while moving toward a greater understanding of alcoholism in his own family history.