Elevating metabolism, and burning more calories than are consumed, lead to fat loss and weight loss. Consumption of substances such as caffeine has been shown to raise metabolism, and therefore may lead to fat burning. However, caffeine is not without both short and long term side effects, such as anxiety, elevated heart rate, and gastrointestinal problems. The guidance of a health care professional should be sought before starting any diet program or diet supplements.
There is some evidence that the calcium in dairy foods can help increase fat loss. Foods that are low-calorie, but give a feeling of fullness, may lead also to fat burning. Examples of these foods are oatmeal, low-fat dairy foods, broccoli, lean meats such as turkey, and fruits such as apples and pears.
It is unlikely that any "fat burner" supplement alone will result in safe and long-term fat loss. Fat burning supplements may increase metabolism, but often work by overstimulation or irritation of body systems. Consuming fewer calories than are burned through daily activity and exercise is the most straightforward strategy for burning fat and losing weight.