This project will be a three-group controlled 6-wk feeding study where all meals are prepared and provided to obese participants. All participants will be fed a 25% energy-restricted diet. Two diets will be very low in carbohydrate (i.e., ketogenic diets) designed to induce nutritional ketosis and fat loss. Another diet will be low in fat and saturated fat but contain the same total calories. Participants will be randomly assigned to a Ketone Supplement group who are provided an exogenous pre-formed source of beta-hydroxybutyrate (BOHB) or a Control group that only receives the standard ketogenic diet. Randomization will be stratified based on insulin resistance, sex, and body composition to ensure balanced group assignment. Because of timing of recruitment (i.e., after most of the ketogenic groups have already completed the study), the low-fat group will not be randomized. Outcome measurements will be made at various intervals over the 6-wk intervention.
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Daily Ketone/Glucose Monitoring
Timeframe: Up to 6 weeks
Cholesterol (mg/dl)
Timeframe: up to six weeks
Insulin (mIU/L)
Timeframe: up to six weeks
Glucose (mg/dL)
Timeframe: up to six weeks
Lean Mass (kg)
Timeframe: up to six weeks
Fat Mass (kg)
Timeframe: up to six weeks