Background Obesity is a major health problem worldwide, and it is a risk factor for several chronic disorders. Even small changes in energy intake, leading to a positive balance may lead to weight gain over time. Thus, slight modifications in food intake, such as the inclusion of foods that effect energy balance, may prevent weight gain and even facilitate weight loss. Replacing dietary fat with low-calorie fat (LCF), such as modified triglycerides with medium and long chained PUFA.may be an efficient way to reduce body fat.