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Trehalose is a disaccharide composed of two glucose molecules bound via the number 1 carbon of the two glucose units. Trehalose is not found in high quantities in the diet but has been detected in foods such as mushrooms, honey, shrimp, lobster, and foods made with yeasts. One study has determined that feeding trehalose 45 minutes prior to cycling exercise produces a lower glycemic and insulinemic response in comparison to glucose.375 However, no difference in cycling performance was detected in that study.