BOSTON—Eating two or more servings of fish a week may increase diabetes risk, according to a new study from the Harvard School of Public Health.
The study, published in American Journal of Clinical Nutrition, examined the link between fish and omega-3 fatty acid intake and the development of diabetes among 152,700 women enrolled in the Nurses' Health Study and 42,504 men enrolled in the Health Professionals Follow-Up Study. Overall, 9,380 cases of adult-onset diabetes developed among these healthcare workers during up to 18 years of follow up. After adjusting for lifestyle and other dietary factors, plus body weight, family history of diabetes, and menopausal status and hormone use when applicable, researchers noted increased diabetes risk "in all cohorts" consuming higher levels of omega-3 fatty acids.