When they mean the amount of useful substances that this or that food contains, they use the concept of "energy value". This term refers to the number of kilocalories that is released in the human body during the processing of a product. To give the reader a concept of what one calorie is, it is worth noting that this is such a part of the heat that can heat a liter of liquid by one degree. This is the smallest unit of energy. In our case, it is of particular importance. This is the amount of energy that is usually released as heat during food processing. The number of calories worked out (or kilocalories) is individual for each individual product. As for drinks. For example, a gram of fat gives 9 calories, a gram of carbohydrates (or protein) - 4 calories, and a gram of alcohol contains on average 7 calories.
Due to the way of life or profession, the need of people for the energy that is released during food processing is individual. One person needs a lot of food calories in order to cope with heavy stresses, mental or physical, and for another, such a dose will be more likely to be harmful, since excess calories can "turn" into a new layer of fat on the body. And each new centimeter of cubic fat is whole meters of the thinnest vessels, capillaries, with which it will be provided with everything necessary. And this, in turn, is an extra load on the body.
So, energy consumption depends on the type of activity. For every hour spent by a person in a dream, about 65 calories are burned. As mentioned above, you should not consume more food than is necessary for normal life, as this leads to excess weight. In other words, to the accumulation of adipose tissue. What needs to be done so that body weight does not grow, but decreases? That is, how to lose weight, lose weight?
You need to calculate how many calories you consume and how much you spend. Is there a difference between the two, and is it significant? Do you consume more food than you need, or, on the contrary, do you lack the energy that it gives?
On average, to normalize his weight, a man needs to consume 1,500 calories per day, and a woman - 1,300. And you can also systematize your diet. How? For example, you will consume three hundred calories for breakfast, as many for lunch, and six hundred for dinner. And all of them will be 1500.
Here you may have a question: how is the energy value of the food you eat calculated? There is a special table in which comprehensive information is provided on this topic. In it, opposite to each product, the amount of calories produced by processing it in the intestine is determined. Such a table is not difficult to find on the Internet. With it, you can determine how many calories you consume per day. The table usually indicates how many proteins, fats and carbohydrates are in a particular product. Even if it does not indicate energy value, then, knowing the number of calories per gram of protein, fat or carbohydrates, you can easily calculate how many calories you consume per day. So, a few words about those products that appear on your table daily. Perhaps the greatest energy value of butter is cream (748 calories), ghee (887) and sunflower (899). In second place is fat, mutton or beef (897). On the third - fat (over 700 kcal). High and high- calorie walnuts due to their high fat content.
However, the information in such tables can be said to be conditional. For example, the energy value of bread will depend on the raw material from which it was made. That is, from which cereals the flour was extracted, from which the dough was made for baking bread, whether it is unleavened dough, yeast or not, etc. The energy value of cow's milk on average is 58 calories, dry - 478, and condensed - about 300.