Acute fructose administration improves oral glucose tolerance in adults with type 2 diabetes.

Moore MC, Davis SN, Mann SL, Cherrington AD
Diabetes Care. 2001 24 (11): 1882-7

PMID: 11679451 · DOI:10.2337/diacare.24.11.1882

OBJECTIVE - In normal adults, a small (catalytic) dose of fructose administered with glucose decreases the glycemic response to a glucose load, especially in those with the poorest glucose tolerance. We hypothesized that an acute catalytic dose of fructose would also improve glucose tolerance in individuals with type 2 diabetes.

RESEARCH DESIGN AND METHODS - Five adults with type 2 diabetes underwent an oral glucose tolerance test (OGTT) on two separate occasions, at least 1 week apart. Each OGTT consisted of 75 g glucose with or without the addition of 7.5 g fructose (OGTT + F or OGTT - F), in random order. Arterialized blood samples were collected from a heated dorsal hand vein twice before ingestion of the carbohydrate and every 15 min for 3 h afterward.

RESULTS - The area under the curve (AUC) of the plasma glucose response was reduced by fructose administration in all subjects; the mean AUC during the OGTT + F was 14% less than that during the OGTT - F (P < 0.05). The insulin AUC was decreased 21% with fructose administration (P = 0.2). Plasma glucagon concentrations declined similarly during OGTT - F and OGTT + F. The incremental AUC of the blood lactate response during the OGTT - F was approximately 50% of that observed during the OGTT + F (P < 0.05). Neither nonesterified fatty acid nor triglyceride concentrations differed between the two OGTTs.

CONCLUSIONS - Low-dose fructose improves the glycemic response to an oral glucose load in adults with type 2 diabetes, and this effect is not a result of stimulation of insulin secretion.

MeSH Terms (15)

Adult Area Under Curve Blood Glucose Diabetes Mellitus Diabetes Mellitus, Type 2 Fatty Acids, Nonesterified Fructose Glucose Tolerance Test Glycerol Humans Lactates Obesity Single-Blind Method Time Factors Triglycerides

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