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Blood sugar and insulin levels rise every time you eat something containing carbohydrates. How high they rise, and how fast, depends on the food. White rice has almost the same effect as eating pure sugar—a quick, high spike in blood sugar and insulin followed by an equally fast drop. Brown rice and other whole grains have slower, smaller effects. The glycemic index captures these changes by rating the effect of a specific amount of a food on blood sugar compared with the same amount of pure glucose. The lower the glycemic index, the slower the rise in blood sugar. "Glycemic index categories can be very helpful for people trying to choose a healthy diet," says Dr. Frank Hu, professor of nutrition at the Harvard School of Public Health. Over the past three decades, researchers have measured the glycemic index of several thousand foods. You can find a list of the glycemic index values of 100 foods on the Harvard Health website. Read the full-length article: "Choosing good carbs with the glycemic index" Also in the November 2012 Harvard Health Letter: New Pap smear guidelines Take action against high blood pressure Alternative treatments for knee pain: effective or snake oil? The Harvard Health Letter is available from Harvard Health Publications, the publishing division of Harvard Medical School, for $16 per year. Subscribe at www.health.harvard.edu/health or by calling 877-649-9457 (toll-free). ### For advertising and promotion on HealthNewsDigest.com please contact Mike McCurdy: tvmike13@HealthNewsDigest.com or 877-634-9180 HealthNewsDigest.com is syndicated worldwide, to thousands of journalists in all media, and health-related websites. www.HealthNewsDigest.com Top of Page 
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