Glycemic Response of Bean-and-rice Meals in Type 2 Diabetes Mellitus

The study uses a randomized, placebo-controlled experimental design consisting of 4 different test treatments matched on carbohydrate (CHO) content. The three beans are similar in their CHO content amount for ½ cup at \~20 grams CHO. Each of the bean varieties will be served in a \~½ cup serving size with \~ ½ cup of plain steamed white rice (30 grams CHO) for a total of 50 grams of CHO per meal for each of the three test treatments. The 4th placebo or control treatment consists of \~ 7/8 cup of rice alone, an amount consistent with the CHO content of the test meals. Most diabetic meal plans recommend no more than 45-60 grams of CHO per meal. Fifty grams of CHO is a standard amount for glycemic response testing in general. The investigators hypotheses were: * The test meals containing the three bean types in combination with white rice will decrease the participants' glycemic response when eaten as part of a meal. * The reduction in post-prandial glycemia will not differ between bean types in the elicited responses among individuals with type 2 diabetes.