This study will compare two energy reduced diets; one diet will include one Haas avocado/day while the other diet will follow the usual American dietary pattern. All subjects will receive a dietary plan that reduces their usual intake by 500kcal/day with the same percentage of fat, protein and carbohydrates. The results from this study may help to explain if eating one Haas avocado/day can achieve at least equivalent weight loss when compared to the usual American diet.