The Effect of Sugar Sweetened and Diet Beverages Consumed as Part of a Weight-Maintenance Diet on Fat Storage

Inclusion Criteria: * Male or Female * Age between 20-50 years * Body Mass Index (BMI) 21.0 to less than 30.0 * Consumer of at least one sugar sweetened or diet beverage per day Exclusion Criteria: * More than a 3% change in weight within the 3 months prior to enrollment in the study. * Menstrual cycle that is not regular or post-menopausal * Continued consumption of a prescription medication for weight loss. If subject is willing to discontinue prescription medication(s) immediately and willing to refrain from taking medication(s) for duration of study, he/she may be enrolled after a four-week washout period. * Continued consumption of over-the-counter weight loss supplement(s). If subject is willing to discontinue supplement(s) immediately and willing to refrain from taking supplement(s) for duration of study, he/she may be enrolled after a two-week washout period. * Continued enrollment in commercial weight loss program (e.g. Jenny Craig, Weight Watchers) or self-help group (e.g. TOPS, Overeaters Anonymous). If subject is willing to discontinue program immediately and willing to refrain from program for duration of study, he/she may be included after a two-week washout period. * History of thyroid disease, but not taking medication or medication dosage changed one or more times over last 6 months. History of thyroid disease and on a stable dose of prescription medication for 6 months or longer is acceptable. * Diagnosed with Type I or Type II diabetes or prediabetes. * History of major surgery within three months of enrollment. * History of heart problems (e.g. angina, bypass surgery, MI, etc.) within three months prior to enrollment. * Presence of implanted cardiac defibrillator or pacemaker. * Hypertension/high blood pressure, or any hypertensive medication. * History of a surgical procedure for weight loss at any time (e.g. gastroplasty, gastric by-pass, gastrectomy or partial gastrectomy). * Gastrointestinal disorders including chronic malabsorptive conditions, peptic ulcer disease, Crohn's disease, chronic diarrhea or active gallbladder disease. * History of inflammatory bowel disease * History of fatty liver * History or presence of cancer. Persons with successfully resected basal cell carcinoma of the skin may be enrolled if treatment completed more than 6 months prior to enrollment. * History of clinically diagnosed eating disorders including anorexia nervosa, bulimia nervosa or binge eating disorder. * Women who are pregnant, lactating or trying to become pregnant. * Any change in prescription medication within 3 months prior to enrollment * Currently consuming \>14 alcoholic drinks (1 drink = 12 fl oz beer, 4 fl oz wine or 1.5 fl oz liquor) per week. * Known allergy to high fructose corn syrup, sucrose, fructose or glucose. * History of alcohol dependency * Extreme exercise regimes (eg. Marathon or triathlon) * Currently smoking cigarettes * Any clinically significant food allergy * Participation in another clinical trial within 30 days prior to enrollment.