Patient description: The patient is a 34-year-old obese woman who comes to the clinic with weight concerns. She is 165 cm tall, and her weight is 113 kg (BMI: 41.5). In the past, she unsuccessfully used antiobesity agents and appetite suppressants. She is complaining of sleep apnea, PCO and dissatisfaction with her body shape. She is a high-school teacher. She is married for 5 years. She doesn't use any contraceptive methods for the past 4 months and she had no prior pregnancies. She rarely exercises and movement seems to be hard for her. She is not able to complete the four-square step test in less than 15 seconds. She does not smoke or use any drugs. Her BP: 130/80, HR: 195/min and her BMI is: 41.54. Her lab results: FBS: 98 mg/dl TG: 150 mg/dl Cholesterol: 180 mg/dl LDL: 90 mg/dl HDL: 35 mg/dl She is considering a laparoscopic gastric bypass.

Clinical trial eligibility criteria: eligible ages (years): 31.0-60.0,  Diabetes Obesity Informed consent obtained before any trial-related activities 2. Age at study entry is between 31-60 years of age 3. Body Mass index (BMI) between 30-49 kg/m2 using measured height and weight 4. Body weight <350lbs (MRI table limit) 5. Stable body weight during the previous 3 months with a less than 5 pounds self -reported weight change 6. Type 2 diabetes, insulin naïve (except for use during gestational diabetes) on either metformin, sitagliptin, or dipeptidyl-4 inhibitor (sitagliptin or saxagliptin), or a thiazolidines (rosiglitazone or pioglitazone) 7. HbA1c level between ~6-8% 8. Lives in a community dwelling and has a telephone 9. Agrees to avoid alcohol and exercise within 48 hours of CRC visits, and to comply with the dietary/stimulant restrictions for 48 hours before PET and fMRI studies. 10. Able and willing to follow prescribed menus plans  Known or suspected hypersensitivity to study drug (insulin detemir) 2. Significant co-morbidities including cardiovascular disease, atherosclerotic disease, pulmonary disease, metabolic disease, liver or renal insufficiency 3. Significant pathologic finding on MRI (research MRI scans are not clinical scans and are not standardly read by a neuroradiologist, but if an overt anomaly is noted by study personnel, an advisory read will be obtained and the patient will be provided with the information for follow-up with his/her physician). 4. Clinically significant abnormalities on screening EKG 5. History of Substance Abuse, including but not exclusive to alcohol, cocaine, marijuana, heroin, nicotine 6. Any tobacco use in last 3 months 7. History of psychiatric disorder deemed too severe to permit participation (PI discretion) including subjects with a lifetime history of lifetime Psychotic Disorder (Schizophrenia, Schizoaffective, Psychosis NOS) or Bipolar Disorder, suicide attempt or history of any suicidal behavior or history within the past 6 months of Post Traumatic Stress Disorder, Generalized Anxiety Disorder 8. Long term use of steroids or medications that may cause weight gain within 3 months of study or in foreseeable need (e.g. uncontrolled asthma or rheumatologic disorder). 9. Inability to abstain from alcohol, physical exercise or > 1 cup of coffee or equivalent daily for 2 days prior to imaging studies 10. Any contraindication which would interfere with MRI or PET studies, e.g. claustrophobia, cochlear implant, metal fragments in eyes, cardiac pacemaker, neural stimulator, tattoos with iron pigment and metallic body inclusions or other metal implanted in the body 11. Females of childbearing potential who are pregnant, breast-feeding or intend to become pregnant or are not using adequate contraceptive methods (abstinence or the following methods: diaphragm with spermicide, condom with spermicide by male partner, intrauterine device, sponge, spermicide, Norplant, Depo-Provera or oral contraceptives) 12. History of uncontrolled thyroid disease evidenced by TSH outside normal range 13. Obesity induced by other endocrinologic disorders (e.g. Cushing Syndrome, Polycystic ovarian syndrome) 14. Previous surgery for weight loss 15. High level aerobic activity such as running for longer than 60 minutes more than 2 times a week regularly in last 3months 16. Significant eating disorder or dietary restraints as determined by three factor eating questionnaire (TFEQ) 17. Appetite reducing diet supplement or herbal supplement use in last 6 months 18. . Food allergy or diet restrictions that would interfere with balanced intake and caloric goals. 19. Dietary supplements of such as EPA, DHA or omega-3 fatty acids. 20. Daily intakes of coffee, black tea and other caffeinated beverages will be assessed and subjects who consume the equivalent of >4 cups coffee or black tea/day at baseline will be excluded 21. Any condition felt by PI or co-investigators to interfere with ability to complete the study