WASHINGTON—A new scientific review in May’s peer-reviewed journal Nutrition Reviews shows that people who consume dairy products are likely to gain weight or show no effect in terms of body weight or body fat. Two large observational studies led by Harvard researchers, one including 12,829 adolescents and the other involving more than 19,000 adult men, found that dairy consumption is linked to weight gain. Of the 49 randomized controlled studies analyzed for this review, two showed weight gain, and most of the studies, 41, showed no effect. The only studies showing weight loss were led by industry-funded researchers.