Reduction of energy intake and weight loss independently improve insulin sensitivity in individuals with type 2 diabetes mellitus in the short-term. In addition, weight loss decreases serum lipids, fasting blood glucose, A1C, and abdominal fat in individuals with type 2 diabetes. Weight loss and maintenance requires intensive lifestyle programs with consistent long-term contact. (2001)

• Grade I means there is Good/Strong evidence supporting the statement;
• Grade II is Fair;
• Grade III is Limited/Weak;
• Grade IV is Expert Opinion Only;
• Grade V is Not Assignable.
• High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
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