'Glycemic Index' May Be Too Unreliable to Manage Diabetes: Study Wide variability seen after eating same food at different times

In the study, researchers checked blood sugar responses in 63 healthy adults after eating the same amount of white bread three different times over 12 weeks. The investigators found that glycemic index values varied an average of 20 percent among individuals and 25 percent between different study participants. "Glycemic index values appear to be an unreliable indicator even under highly standardized conditions, and are unlikely to be useful in guiding food choices," said lead author Nirupa Matthan. She is a scientist at the U.S. Department of Agriculture Human Nutrition Research Center at Tufts University in Boston. "If someone eats the same amount of the same food three times, their blood glucose response should be similar each time, but that was not observed in our study. A food that is low glycemic index for you one time you eat it could be high the next time, and it may have no impact on blood sugar for me," she explained in a university news release. https://consumer.healthday.com/vitamins-and-nutrition-information-27/food-and-nutrition-news-316/glycemic-index-too-unreliable-for-use-in-diabetes-management-study-714520.html