Study Details: Participants will come after a 12h overnight fast to the Risk Factor Modification Centre at St. Michael's Hospital or the Department of Nutritional Sciences, University of Toronto immediately prior to commencement of each treatment phase and at weekly intervals during the metabolic study and monthly during the ad libitum study. Prior to the start of the study, participants will be instructed on details of the study diet protocol. They will also be asked to maintain a constant level of physical activity throughout the course of the study. At all visits, body weight (in kg) will be obtained in indoor clothing, without shoes, and blood pressure will be taken twice in the dominant arm after participants have been seated for at least 20 minutes. Height (in cm) will be recorded at the first visit. Body composition measurements will be measured using bioelectric impedance at baseline and week 4 of the metabolic phase, and months 3 and 6 of the ad libitum phase. Throughout the study period, participants will maintain the diet prescribed on their initial visit. At each visit, participants will provide a fasting blood sample and seven-day food records will be collected. During the last week of the metabolic and ad libitum study, 24h fecal and urine collections will be completed.