This project will compare medical nutrition therapy personalized by continuous glucose monitor (CGM) feedback to control interventions in participants with type 2 diabetes mellitus (T2DM).

Inclusion Criteria:

• at least 18 years of age
• previous diagnosis of T2DM
• HbA1c of 6.8-8.5%

Exclusion Criteria:

• type 1 diabetes mellitus
• treatment with insulin, sulfonylurea, or meglitinide
• use of nondiabetic medications that affect blood glucose control (such as corticosteroids)
• BMI <25 kg/m2 or <23 kg/m2 for participants who self-identify as Asian
• weight change >5 pounds in the 3 months prior to study enrollment
• estimated glomerular filtration rate <60 ml/minute/1.73 m2
• pregnancy or immediate plans to become pregnant 8) breastfeeding 9) anemia (which would affect measurement of HbA1c) 10) changes to glucose lowering medications, including change in dose, in the 3 months prior to enrollment 11) presence of any disease that would make adherence to the protocol difficult."