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A review of data from 37 studies found low-calorie sugar substitutes, such as aspartame, saccharin or stevia, did not help obese people lose weight and increased the risk healthy people would gain weight, researchers reported in the Canadian Medical Association Journal. Registered dietitian Amy Keating commented it is important for people to read food labels because some products that are not labeled "no sugar added" may use both regular and low-calorie sweeteners.

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