This study will investigate the use of a low biologically available and high protein diet (LoBAG) for treatment of type 2 diabetes mellitus. Subjects with type 2 diabetes will be recruited and asked to adhere to this diet or a control diet for 12 weeks. Food preparation will be done by subjects at home, following instruction from the study team including a dietitian. The study will test the hypothesis that the LoBAG diet will lead to a greater reduction in hemoglobin A1c (HgbA1c) than a control diet over 12 weeks of intervention.