People with type 2 diabetes will be enrolled in a randomized, parallel group trial of the LoBAG diet or a control diet over a 12 week intervention period. Diet assignment will be random (like the flip of a coin). The main intervention will be instruction in either the LoBAG diet or the control diet. Measures of diabetes control will be collected before, during, and after the diet intervention. Stool samples will be used to collect preliminary data on the gut microbiome during the diet intervention. The diets will be isocaloric and subjects will not lose weight during the study. There will be 6 study visits over a 12-13 week period.