Many Americans drink alcohol, which produces a sense of relaxation and euphoria. Moderate drinking, defined by the National Institute on Alcohol Abuse and Alcoholism (NIAAA) as up to two drinks per day for men and one drink per day for women and older people (a standard drink is one 12-ounce beer or wine cooler, one 5-ounce glass of wine, or 1.5 ounces or 80-proof distilled spirits), does not harm most adults. Still, many people in the United States drink too much. According to NIAAA, 1 in every 13 adults-nearly 14 million Americans-abuse alcoholic or are alcoholics. Several million more adults could be on their way to alcohol problems. Men who have more than 14 drinks a week or four drinks at one time and women who have more than seven drinks a week or three drinks at one time are at risk for alcohol abuse or dependence...