Diabetes Care 27:134-140, 2004
© 2004 by the American Diabetes Association, Inc.
Emerging Treatments and Technologies Original Article |
Magnesium Intake and Risk of Type 2 Diabetes in Men and Women
Ruy Lopez-Ridaura, MD1,
Walter C. Willett, MD1,2,3,
Eric B. Rimm, SCD1,2,3,
Simin Liu, MD3,4,
Meir J. Stampfer, MD1,2,3,
JoAnn E. Manson, MD2,3,4 and
Frank B. Hu, MD1,2,3
1 Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts
2 Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
3 Channing Laboratory, Department of Medicine, Harvard Medical School and Brigham and Womens Hospital, Boston, Massachusetts
4 Division of Preventive Medicine, Harvard Medical School and Brigham and Womens Hospital, Boston, Massachusetts
Address correspondence and reprint requests to Ruy Lopez-Ridaura, MD, Department of Nutrition, Harvard School of Public Health, 665 Huntington Ave., Boston, MA 02215. E-mail: rlopez{at}hsph.harvard.edu
OBJECTIVETo examine the association between magnesium intake and risk of type 2 diabetes.
RESEARCH DESIGN AND METHODSWe followed 85,060 women and 42,872 men who had no history of diabetes, cardiovascular disease, or cancer at baseline. Magnesium intake was evaluated using a validated food frequency questionnaire every 24 years. After 18 years of follow-up in women and 12 years in men, we documented 4,085 and 1,333 incident cases of type 2 diabetes, respectively.
RESULTSAfter adjusting for age, BMI, physical activity, family history of diabetes, smoking, alcohol consumption, and history of hypertension and hypercholesterolemia at baseline, the relative risk (RR) of type 2 diabetes was 0.66 (95% CI 0.600.73; P for trend <0.001) in women and 0.67 (0.560.80; P for trend <0.001) in men, comparing the highest with the lowest quintile of total magnesium intake. The RRs remained significant after additional adjustment for dietary variables, including glycemic load, polyunsaturated fat, trans fat, cereal fiber, and processed meat in the multivariate models. The inverse association persisted in subgroup analyses according to BMI, physical activity, and family history of diabetes.
CONCLUSIONSOur findings suggest a significant inverse association between magnesium intake and diabetes risk. This study supports the dietary recommendation to increase consumption of major food sources of magnesium, such as whole grains, nuts, and green leafy vegetables.
Abbreviations: ADA, American Diabetes Association FFQ, food frequency questionnaire HPFS, Health Professionals Follow-up Study NDDG, National Diabetes Data Group NHS, Nurses Health Study MET, metabolic equivalent

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Copyright © 2004 by the American Diabetes Association.
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