NAD Augmentation in Diabetes Kidney Disease

Inclusion Criteria: 1. Has T2DM, as indicated by any of the following: 1. Self-report of diabetes plus the use of a prescribed diabetes medication. 2. ICD-10 code for diabetes plus current use of a diabetes medication in the electronic medical record. 3. HbA1c \>6.4%; or 2 fasting glucose \> 125 mg/dL 2. Fasting morning UACR between 100 and 2,000 mg/g creatinine on two separate days 3. If UACR is \> 300 mg/g creatinine, must be currently using an ACE inhibitor or an ARB 4. eGFR \> 30 mL/ min / 1.73 m2 5. Hemoglobin A1c \<9% 6. Able to speak English or Spanish 7. Willing and able to provide written informed consent 8. In addition, female participants must Not be pregnant and not planning to become pregnant over the next 6 months Exclusion Criteria: 1. Fasting morning UACR \> 2,000 mg/ g creatinine 2. Other laboratory abnormalities: 1. Has AST or ALT \> 3 times the upper limit of normal 2. creatinine \> 2.5 mg/dL 3. Hematocrit \< 0.34 or 0.50 L/L 3. A major adverse cardiovascular event in preceding 3 months 4. Participation in an investigational trial to evaluate pharmaceuticals or biologics within the past 3 months or 5 half-lives, whichever is shorter 5. Hypoglycemia unawareness or other medical conditions which could jeopardize participant's safety. 6. History of alcohol or substance use disorder or dependence (DSM 5 criteria) within the last 2 years. 7. Major depressive disorder, bipolar disorder, schizophrenia, or current psychotic symptoms or behavioral problems that could interfere with study procedures. 8. BMI \> 42.5 kg/ m2