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Research continues on using the glycemic index to regulate diets for losing weight or the treatment of diabetes. Scientists differ in opinions regarding its effect on controlling glucose (blood sugar), losing weight and preventing obesity. Some do not find the glycemic index a helpful method for losing weight or managing diabetes, but other researchers have advocated having the glycemic index placed on food labels.

Because food testing for the glycemic index is not universal, this information is not placed on labels. There are contrasting views about the glycemic index and the use of a low-GI diet for weight control or diabetes remains controversial. More carefully designed research studies are necessary to develop an understanding of the role of the glycemic index in a healthy diet.