 To test this hypothesis, the investigators will conduct a pilot randomized feeding trial comparing two types of low-calorie diets with similar macronutrient composition. Although both diets will ultimately rely on similar caloric deficits to produce weight loss, they will differ at the point of diet initiation. The following will be compared: 1 a traditional diet, where the entire energy deficit is initiated immediately; and 2 a caloric taper diet, during which participants will be gradually reduced from baseline levels of energy consumption to the lower calorie level required for weight loss, over a 6-week period. 