Table 2.

Eligibility criteria for the DiaTeleMed Study

Inclusion criteria

21 to 80 years of age Diagnosed with moderately-controlled T2D (HbA1c: 6.0% – 8.0%) Willing and able to use a smartphone to self-monitor diet Willing and able to attend virtual counseling sessions Willing and able to wear a CGM on their arm for 12 days Free of antibiotic or antifungal therapy for at least 3 months prior to enrollment

Exclusion criteria

Unable to self-monitor diet using an English-only mobile app (e.g., uncorrected sight impairment, illiterate, non- English-speaking, dementia) Baseline use of T2D medications other than metformin Baseline use of medications for weight loss Chronic use of steroids or immunosuppressants Baseline use of atypical antipsychotics Undergoing chemotherapy Pregnant, planning to become pregnant during the study period, or become pregnant during the study Chronic disease that affects energy/glucose metabolism (e.g., Cushing’s syndrome, acromegaly, hyperthyroidism) Requires special dietary management (e.g., late-stage kidney disease, cirrhosis, HIV) Limited control over diet (e.g., are homeless or institutionalized, in a nursing home or personal care facility, or incarcerated) Bariatric surgery or are unwilling to delay bariatric surgery for the next 7 months Diagnosed with a chronic active inflammatory or neoplastic disease in the past 3 years Diagnosed with a chronic gastrointestinal disorder (e.g. inflammatory bowel disease or celiac disease) Active substance use disorder

T2D: type 2 diabetes; CGM, continuous glucose monitor; HbA1c: glycated hemoglobin