In a 28-week behavioral weight control program, 22 obese patients with non-insulin dependent diabetes (NIDDM) were recruited to determine the effects of self blood glucose monitoring (SBGM) in diabetes management. For the first eight weeks, all the participants met in weekly support groups. After eight weeks, the original group was divided in two, with the first half continuing the support groups, and the second adding SBGM and dietary carbohydrate counting. While the results in weight loss were identical for both groups, the study revealed that people in the support group experienced a substantial decline in HbA1c levels, followed by a rapid “rebound,” while in the second group, HbA1c levels consistently declined. The results of the study suggest that SBGM and carbohydrate counting should be recognized as important tools in the management of non-insulin dependent as well as insulin-dependent diabetes.