To reach the conclusion, Lu Wang M.D., Ph.d. of Brigham and Women's Hospital, Boston and his colleagues studied 19,220 U.S. women aged 39 or older who had a body mass index (BMI) in the range classified as normal (18.5 to 25).
Replying to a questionnaire, the participants reported how many alcoholic beverages they typically drank per day. A total of 7,346 (38.2 percent) reported they consumed no alcohol; 6,312 (32.8 percent) drank less than 5 grams, 3,865 (20.1 percent) drank 5 to less than 15 grams; 1,129 (5.9 percent) drank 15 to less than 30 grams; and 568 (3 percent) drank 30 grams per day or more.
Over thirteen years of follow-up, women on an average gained weight progressively. Women who did not drink alcohol gained the most weight, with weight gain decreasing as alcohol intake increased.
A total of 7,942 (41.3 percent) women who initially had normal weight become overweightor obese (BMI of 25 or higher), including 732 (3.8 percent) who become obese (BMI of 30 or higher). When compared with women who did not drink at all, those who consumed little but less than 40 grams per day of alcohol were less likely to become overweight or obese.
Women who drank 15 to less than 30 grams per day had the lower risk, which was almost 30 percent lower than that of non-drinkers. "An inverse association between alcohol intake and the risk of becoming overweight or obese was noted for all four types of alcoholic beverages (red wine, white wine, beer and liquor), with the strongest association found for red wine and a weak yet significant association for white wine after multivariate adjustment."
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