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There is no evidence for the existence of negative calorie foods, but some fruits and vegetables are low in calories and high in nutrition, fiber, and hydration. The claim comes from the thermic effect of food, but typically only 10% of the caloric content of food is burned during digestion. A balanced diet should include ample sources of grains, protein, and other crucial nutrients.
Although there have been many claims to the contrary, historically there has been no documented evidence for the existence of negative calorie foods. Fresh foods like celery and grapefruit have been particularly popular diet foods because of these supposed qualities. Despite a lack of evidence to support the claim, the idea that the amount of energy required to eat and digest certain foods burns more calories than are present in food has been so attractive to dieters that the myth continues. persisting.
It has been claimed that various types of fruits and vegetables are negative calorie foods. Some of the fruits believed to have these properties include watermelon, pineapple, apple, and cantaloupe. Other popular vegetables believed to be negative calorie foods include cabbage, cucumber, and lettuce.
While there is no evidence that fruits and vegetables are truly negative calorie foods, the items listed are generally low in calories. They also tend to be good sources of nutrition, fiber, and hydration. For this reason, these foods remain a good choice for people who want to lose weight or simply follow a low-calorie diet. However, this does not mean that these foods alone are sufficient for a balanced diet. While so-called negative calorie foods can be part of a good diet, they should be eaten as part of a regimen that also includes ample sources of grains, protein, and other crucial nutrients.
The claim that there are foods with negative calories comes from the concept known as the thermic effect of food. This is the measure of energy expended above that measured in a body at rest, which is known as the resting metabolic rate. Aerobic exercise and weight training are thought to have some effect on the thermic effect of food on the body.
Many of the foods that claim to have a negative caloric effect on the body are already low in calories, and are supposedly made even more so because they are also high in fiber, thus requiring more of the body’s resources to process. While eating and digesting food burns energy and therefore calories, typically only about 10% of the caloric content of food is burned during this process. The amount of calories required to process food also depends on the individual’s body chemistry, in addition to the calories in the food. This is the reason why body metabolism is so varied among different people.
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