The quality of food products includes many properties that characterize their nutritional and biological value, as well as organoleptic, functional, technological, sanitary and hygienic characteristics. Food products provide a person with energy and promote normal metabolism.
Necessary
a table of the energy value of products
Instructions
Step 1
Modern ideas about the qualitative and quantitative human needs for food are reflected in the concept of a balanced diet. According to it, for normal activity, a person needs a certain amount of energy and nutrients: proteins, fats, carbohydrates, amino acids, fatty acids, mineral salts, vitamins and trace elements. Many of the listed substances are irreplaceable, that is, they are not produced in the body, although they are necessary for humans.
Step 2
To characterize a food product, determine its total and elemental composition, establish the degree of compliance of each component with a balanced nutrition formula and find the so-called integral speed. It is expressed in energy units (per 3000 kcal) and reflects the ability of a product to meet the body's needs for the substances it needs.
Step 3
Define for yourself the concept of "nutritional value", it includes the quantitative ratio of nutrients in the product, the total energy value and organoleptic characteristics of the product. Energy value characterizes that part of the energy that is released from food during its biological oxidation in the body. Depending on gender, age, weight and occupation, a person needs to consume from 600 to 5000 kcal per day daily. Do an introspection of your lifestyle and, based on this, calculate how many calories you need per day. Each type of food has a different energy value. For example, 100 grams of meat products contain from 100 to 350 kcal.
Step 4
Proteins in the body are absorbed by 84.5%, carbohydrates 95.6%, fats - 94%. Taking into account the level of absorption of nutrients, calculate the energy value of the product. When 1 g of protein is oxidized, 4, 00 kcal (16.7 KJ) of energy are released, fat - 9, 00 kcal (37.7 KJ), carbohydrates - 3.75 kcal (15, 7 KJ).
Step 5
Calculate the nutritional value of the product by the ratio of the total chemical composition of the product and its mass. In addition to nutritional value in terms of energy, an important indicator of food is its biological value. It characterizes the quality of the protein component of the product as the ratio of the degree of balance of its amino acid composition and the level of digestibility and assimilation of protein in the body.
