The effect of short periods of caloric restriction on weight loss and glycemic control in type 2 diabetes

Diabetes Care
K V WilliamsR R Wing

Abstract

To determine whether an intermittent very-low-calorie diet (VLCD) improves weight loss and glycemic control more than moderate caloric restriction alone. Individuals with type 2 diabetes (n = 54) who were > or = 20% over ideal body weight participated in a 20-week behavioral weight control program. Subjects were randomized to either a standard behavioral therapy (SBT) group or to one of two VLCD groups. SBT subjects received a 1,500-1,800 kcal/day diet throughout. Both VLCD groups followed a VLCD for 5 consecutive days during week 2, followed by either intermittent VLCD therapy for 1 day/week for 15 weeks (1-day) or for 5 consecutive days every 5 weeks (5-day), with a 1,500-1,800 kcal/day diet at other times. Both VLCD groups lost more weight than the SBT group over the 20 weeks (P = 0.04). Although the groups did not differ in fasting plasma glucose (FPG) changes at 20 weeks, more subjects in the 5-day group attained a normal HbA1c when compared with the SBT group (P = 0.04). This benefit was independent of the effects of weight loss. The best predictor of overall change in FPG and HbA1c was the FPG response during the first 3 weeks of the program. Periodic VLCDs improved weight loss in diabetic subjects. A regimen with interm...Continue Reading

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