Does the thinner the food really exist?

gossip: negative energy food (
Negative Calorie Foods
) is that eating not only does not increase the body's energy reserves, but also consumes energy, the more you eat, the more you lose weight. Even the latest feature on the website of a scientific journal introduces

Negative Energy Foods , which includes
25,
foods such as apples, celery, kale, papaya and lettuce.Truth: True negative energy foods don't exist, and most of the low-energy, dietary fiber-rich plant-based foods recommended on the Web are even less reliable than the much-hyped weight-loss products that are advertised under the banner ofNegative Energy ".what is
"
negative energy food
"
?The concept of
negative energy foodhas been around for about a decade, and it does not refer to foods that contain less than zero energy, but to foods that require more energy to digest than they can provide.basic function of food is to provide people with the energy they need for their daily activities. But people also consume some energy during the feeding process, such as chewing, swallowing, digestion and absorption. If digesting a food consumes more energy than food provides, such as
100
grams of
80,
kca of energy, and digesting this food requires
100,
kca of energy, then the energy effect of the food is
-20
kca, which is the theoretical basis for
"
negative energy
The theory seems unassailable, and losing weight while eating is really attractive. But is there
a
"negative energy
"
?energy does it take to digest food?our every move, big to run, swim, small to stand, wink are to consume energy, eating is no exception. The three major nutrients that provide energy in food, namely protein, carbohydrate and fat, all exist in the form of large molecules, the human body can not directly absorb and utilize, must be broken down into small molecules to digest and absorb.E.g. eat a hamburger, first with teeth chewed into a smaller shape into the esophale, and then into the digestive system, there will be a variety of enzymes in the digestive system to further break down these small food particles into smaller molecules, such as starch into monosaccharides, triglycerides into triglycerides into triglycerides and fatty acids, protein into amino acids, and so on, and then complete the digestion and absorption process. The additional energy consumption caused by these processes is the food heat effect (
thermic effect of food, TEF
), also known as the special dynamics of food (
special dynamic action, SDA
), or the dietary heating effect (
diet inducted thermesogens, DIT
). Careful people will find that after eating there will be a feeling of fever, which is the external manifestation of the food heat effect: the food heat effect usually manifests as an increase in human cooling, usually in people eating
1
as a child or so, about
3
hours after reaching its peak.According to
's definition ofnegative energy food , to determine whether a food is a negative energy food, it depends on how much its food heat effect is, will it be greater than the energy it can provide? But a search of the literature reveals that there are hardly any

articles on the
"
"
",
"
Negative Energy Foods " is more likely to appear on online forums, business websites or blogs, and only one officially published book mentionsNegative Energy Foods
"
, but because the author is a strict vegetarian, the author's views have also been questioned and criticized.different food ingredients, there are some differences in the thermal effects of food. Among the three energy-supply substances, protein has the greatest food thermal effect, equivalent to
30%
of its own energy, carbohydrate food thermal effect of
5%-6%
, fat food heat effect is the lowest,
4%-5%
; For a typical mixed food, the thermal effect of food accounts for about
10%
of the energy contained in the food, which means that for every
2000 kcal
energy food eaten, approximately
200 kcal
energy is consumed to digest the food. Therefore, the thermal effect of food is generally around
10%
, and at most
30%
, so the
"
negative energy food
"
does not exist. At least, it's not found yet.energy does this food have?the heat effect of food is not greater than the energy it contains, nutritionists still have some debate about how much energy food has. The method of assessing how many calories there are in food was first created by
wilbur

Atwater
in the
19th and

20th
centuries. It's an easy way to evaluate it, treating the energy of
1
grams of protein as
4
calories,
1
grams of fat as
9
calories, and
1
grams of carbohydrate as
4
calories, which was later modified to add
1
grams of dietary fiber equal to
2
calories. Nutritionists have long used this method to calculate food energy. this year's issue of
Science
reminds us that today's methods of calculating food energy may not be accurate. In this paper, researchers at Harvard University argue that the energy values of food are not all simple numbers, and that there may be errors in the current method of evaluating food energy values. Because, there are some factors that affect the actual energy effects of food on the human body. For example, the way food is processed changes the energy consumed by food digestion, resulting in different energy effects on people when we eat it. In the case of grain particles rich in resistant starch, such as barley or soy, such foods take a long time to digest, but crushing the same grains into powders or processing them into breakfast grains or ready-to-eat cereals can become easier to digest, eat more easily, and produce different energy effects, which may increase the risk of obesity. reminds us that differences in food digestion and metabolism are associated with obesity. Some foods become easier to digest and absorb after processing, contain energy and high, eat quickly, if accidentally eat more, the risk of obesity will be greater, such as white bread, crispy biscuits, cakes and so on, such foods as little as possible to eat; Chewing is not easy to digest and absorb, even if eating a little more, the risk of gaining weight is relatively small, such as celery, apples and so on, but does not mean that the energy required to consume these foods is greater than the energy they can provide, it is impossible to eat these foods to achieve the purpose of energy consumption. Conclusion From the current research evidence, there is no

negative energy food
"
, those with

negative energy food
"
weight loss products are mostly hyped concept. If you want to lose weight, you still have to start by controlling your energy intake and increasing your energy consumption.