Diabetes Prevention Program With or Without Hunger Training in Helping to Lower Breast Cancer Risk in Obese Participants

Inclusion Criteria: * Body Mass Index (BMI) \>= 27 kg/m\^2. * At high risk of developing breast cancer defined by one or more of the following: Gail model lifetime risk \> 20% or a 5 year risk \>1.66%, a history of deleterious BRCA1/2 mutation or mantle radiation, a history of ductal cancer in situ, or a history of high risk premalignant breast lesion. * 12 months without a period/menstrual cycle or having had a bilateral oophorectomy. * Ability to take digital time stamped photos. * Internet access (daily). * Reports being proficient in English (can read/write and speak fluently). Exclusion Criteria: * Previous participation in this trial. Participation is defined as screening. Re-screening is not allowed except for individuals excluded for BMI. Patients previous screened as ineligible due to BMI are allowed to be re-screened and enrolled if eligible. * Has a current measured BMI less than 27 kg/m\^2. * Reports being unwilling to use Continuous Glucose Monitor (CGM), which requires daily blood sampling by finger pricks. * Currently being actively treated for cancer other than nonmelanoma skin cancer. * Known inability to participate in the ongoing appointments for the four months of the study and scheduled follow-up tests. * Reported current diagnosis or history of type I diabetes or type 2 diabetes. * Reported use of oral antidiabetic agents (OADs). * Current use of any drug (except metformin) or anticipated change in concomitant medication, which the investigator's opinion could interfere with the glucose metabolism (e.g. systemic corticosteroids). * Previous or current treatment with any insulin regimen other than basal insulin, e.g. prandial or pre-mixed insulin (short term treatment due to intercurrent illness including gestational is allowed at the discretion for the investigator). * Previous or current treatment with GLP-1 receptor agonists (e.g. exenatide, liraglutide). * Fasting blood glucose level \> 126 and glycosylated hemoglobin (HbA1c) \> 7%. * Subjects considered by the investigator as unsuitable for the study for reasons not otherwise stated.