A negative-calorie food is food that requires more food energy to be digested than the food provides.
Video Negative-calorie food
Foods
Foods that are negative in calories are mostly low-calorie fruits and vegetables such as celery, grapefruit, lemon, lime, apple, lettuce, broccoli, and cabbage. Celery has a thermic effect of around 8%, much less than the 100% or more required for a food to have "negative calories". A medium stalk of celery provides 6 calories to the body (0.6g of fiber, 0.54g sugar, 98% water), but the body expends only half a calorie digesting it. Even proteins, which require the most energy to digest of any macronutrient, have a thermic energy of only 20%-30%.
Diets based solely on negative-calorie food do not work as advertised but can lead to weight loss because they satisfy hunger by filling the stomach with food that is not calorically dense. A 2005 study based on a low-fat plant-based diet found that the average participant lost 13 pounds (5.9 kg) over fourteen weeks; the authors attributed the weight loss to the reduced energy density of the foods resulting from their low fat content and high fiber content, and the increased thermic effect. A study on chewing gum reports mastication burns roughly 11 kcal (46 kJ) per hour.
Maps Negative-calorie food
See also
- Diet food
- Dieting
- Calorie restriction
- Very-low-calorie diet
References
Source of article : Wikipedia
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