Division of food products into groups

Food products are typically divided into groups based on their nutritional properties and biological classifications. Here are some common ways food is grouped:

Traditional Food Groups Fruits and Vegetables: Includes fresh, frozen, canned, and dried fruits and vegetables. Examples: apples, oranges, spinach, carrots.

Grains: Includes whole grains and refined grains. Examples: wheat, rice, oats, barley.

Proteins: Includes meat, poultry, seafood, beans, peas, eggs, processed soy products, nuts, and seeds.

Examples: chicken, fish, lentils, tofu.

Dairy: Includes milk, yoghurt, cheese, and fortified soy beverages. Examples: milk, cheese.

Fats and Oils: Includes oils, butter, margarine, and other fats. Examples: olive oil, butter, avocado.

NOVA Classification

• This system groups foods based on the extent and purpose of their processing:Unprocessed or Minimally Processed Foods: Natural foods are altered by processes like drying, crushing, roasting, boiling, freezing, etc. Examples: fresh fruits, vegetables, grains, nuts.
  
  
• Processed Culinary Ingredients: Substances extracted and purified from minimally processed foods. Examples: oils, butter, sugar, salt.
  
  
• Processed Foods: Foods made by adding salt, oil, sugar, or other substances to minimally processed foods. Examples: canned vegetables, cheeses, freshly made bread.
  
  
• Ultra-Processed Foods: Industrial formulations typically have five or more ingredients. Examples: soft drinks, packaged snacks, instant noodles

• Dairy products

Many people still underestimate the wonderful properties of dairy products. However, milk almost completely meets the needs of children and adults. 100 g of milk contains more than 3 g of protein, about 3-3.5 g of digestible fat, a large amount of calcium and phosphorus, as well as vitamins A, D and B2 (in summer, the content of these vitamins in cow's milk is significantly higher than in winter). 100 g of milk gives the body about 65 calories. Half a litre of milk a day is more than 1/2 of a person's daily requirement of animal protein and more than 1/10 of the daily energy requirement.

Properly fermented sour milk contains bacteria that carry out uric acid fermentation, which inhibits the development of putrefactive microbes in the human large intestine.

Various types of cheese and cottage cheese, including skimmed cottage cheese, are very valuable foodstuffs. It contains the largest amount of protein - about 17% and a small amount of fat 0.5%. Skimmed cottage cheese has a low-calorie content (about 80 kcal in 100 g of the product). In addition, cottage cheese, as well as in other dairy products, contains relatively large amounts of lecithin and a somewhat smaller amount of essential amino acid methionine, which have a pronounced lipotropic effect, ie the ability to prevent the development of very destructive to the body obesity of the liver.

Milk powder is especially rich in protein, about 23%. The calorie value of 100 g of dried milk is about 450 calories.

A high-calorie product due to the sugar introduced into it is condensed milk, which contains on average 7% protein, 8% fat, 50% carbohydrates.

Milk and milk products have a very favourable combination of complete proteins, digestible fats, some minerals and vitamins. Milk should be included in the daily diet. The achieved level of milk production provides the population, especially children, with the necessary amount of high-quality milk protein and easily digestible calcium.

• Proteins

The second group is meat, fish and eggs. There is no product whose benefits are more debated than meat. To date, a relatively large percentage of the world's population has different attitudes towards meat for many reasons, including religious ones. A considerable group of scientists, based on the data on the negative consequences of overloading the organism with protein substances and on the presence of extractive substances in meat, which have a strong influence on metabolic processes, continues to preach the complete rejection of meat food. In many countries and population groups there are centuries-old bans on certain types of meat. In India, for example, no beef is eaten, and among Muslims, there is a ban on pork.

Meat is undoubtedly a healthy product: mainly due to its high content of complete animal protein, different types of meat and poultry contain between 14 and 24 per cent protein. In addition to protein, meat contains a significant amount of fat, which affects its calorie value and contributes to rapid saturation. The presence of fat varies from a fraction of a per cent in lean veal to 30-40 per cent in tallow pork, and the caloric value ranges from 80 calories in 100 g of veal to 370 calories in the same portion of tallow pork. All types of meat, especially liver, are rich in iron, as well as vitamins A, B1, B6, B12. Meat contains so-called extractive substances that stimulate the appetite and encourage the release of digestive secretions.

For an adult engaged in light physical labour, 150-200 g of meat or meat products per day is sufficient for a mixed diet.
In certain diseases, especially gout, kidney disease, and nervous system disorders, meat in such quantities, especially in fried form, is not recommended.

The biological value of fish proteins is the same as meat proteins, as their amino acid composition is quite similar. It has been found that fish proteins and many sea products are even slightly easier to digest and assimilate in the human body.

Eggs are a very valuable and nutritious food, especially for young people. They contain the best proteins in terms of amino acid composition. The egg yolk contains a high percentage of fat and phosphatides, significant amounts of iron, calcium, phosphorus, and vitamins A and D.

Even the elderly should not fully avoid eggs from their diets due to their relatively high cholesterol level.

• Grains

Foods containing a large amount of carbohydrates.

These include flour, bakery products, cereals, pasta. The main importance of products of this group is supplying the body with energy.

A special place of products of the group is occupied by bread. 

In the diet of most people bread even in quantitative terms takes the first place. An adult man eats a day about 300 - 500 g of bread, and sometimes with heavy physical work and 800. Bread contains 40 to 45% carbohydrates, which means that it provides about 600-1600 kcal of energy per day. Consequently, from 14 to 1/2 of all the energy needed for vital activity a person receives with bread.

Unfortunately, bread made from refined flour, which contains much lower amounts of mineral salts and vitamins, is becoming more and more common. However, bread cooked with coarse flour is healthier for the majority of persons in good health.

A valuable product in this group is the potato. Nutritious and tasty, it is consumed by the population of many countries in relatively large quantities. 100 g of potatoes contain about 20 g of starch, 2 g of su, protein, 1.2 g of mineral salts. Potatoes are relatively low in vitamin C, but since they are eaten a lot, they become one of the important sources of ascorbic acid during the winter and spring months.

Potatoes are a high-calorie product, so the amount of them in the diet with a tendency to obesity should be limited.

Finally, sugar, which also belongs to this group of foods, is a pure carbohydrate. Sugar contains virtually no proteins, salts, vitamins or trace elements. Therefore, the consumption of large amounts of sugar can only be justified by strenuous physical work, intensive sports activities, and a doctor's prescription.

Therefore, the overall energy content of the goods in this group might be as high as 50–70% of the daily caloric intake.

• Fats and Oils 

The daily fat requirement of an adult is 80-100 g, of which just under 1/3 should be vegetable oils.

Nearly one-third of the daily energy needs of the human body are met by fats in the diet.

Types of Fats and Oils

Saturated Fats:Sources: Animal products (butter, cheese, red meat), tropical oils (coconut oil, palm oil).

Characteristics: Solid at room temperature.

Health Impact: Can raise LDL (bad) cholesterol levels if consumed in excess.

Unsaturated Fats:

• Monounsaturated Fats: Sources: Olive oil, avocados, nuts (almonds, peanuts).

• Characteristics: Liquid at room temperature but may solidify when chilled.

• Health Impact: Can help reduce LDL cholesterol and maintain HDL (good) cholesterol levels.

• Polyunsaturated Fats:
• Sources: Fish (salmon, mackerel), flaxseeds, walnuts, sunflower oil.

• Characteristics: Liquid at room temperature.

Health Impact: Includes omega-3 and omega-6 fatty acids, which are essential for brain function and cell growth.

Trans Fats: Sources: Partially hydrogenated oils, some margarines, packaged snacks, baked goods.

Characteristics: Solid at room temperature.

Health Impact: Can raise LDL cholesterol and lower HDL cholesterol, increasing the risk of heart disease.

Cooking: Use oils like olive oil or canola oil for cooking to incorporate healthier fats into your diet.

 

• Fruits and Vegetables

Vegetables and fruits are the most important suppliers of vitamins C, P, E, some B vitamins, provitamin A - carotene, mineral salts (especially potassium salts), trace elements, carbohydrates, phytoncides that help to destroy pathogenic microbes and substances necessary for the normal functioning of the intestine.

A remarkable property of vegetables is their ability to significantly increase the secretion of digestive juices and enhance their enzyme activity.

Meat and fish dishes are better digested by the body if they are eaten with vegetables. Vegetable dishes increase the secretion of digestive glands and thus prepare the digestive tract to digest protein and fatty foods. Therefore, it is useful to start lunch with vegetable snacks, vinaigrettes and salads, and then move on to soups, etc.

Vegetables are not only suppliers of important nutrients and vitamins, they are also dynamic regulators of digestion, increasing the ability to absorb nutrients. Vegetables are very valuable and necessary for the body every day in all seasons.

The development of canned food products also makes an undoubted contribution to vitamin enrichment. One of the most gentle ways of preserving fruits and vegetables, providing good preservation of their nutritional value and flavour properties, is freezing. Frozen fruit and tomatoes are very useful.

A daily food ration is a fixed amount of food designated to meet the nutritional needs of an individual for one day. The composition of a daily food ration can vary based on dietary guidelines, cultural preferences, and specific nutritional requirements. Here’s a general overview

Example of a Balanced Daily Food Ration

• Breakfast:
  

Whole grain cereal with milk
A piece of fruit (e.g., banana or apple)
A handful of nuts

• Lunch:
  

Grilled chicken or tofu salad with mixed greens and a variety of vegetables
Whole grain bread or brown rice
A serving of yoghurt

• Dinner:
  

Baked fish or lentil stew
Steamed vegetables
Quinoa or whole-grain pasta

• Snacks:
  

Fresh fruit
Vegetable sticks with hummus
A small portion of dark chocolate

Special Considerations

• Hydration: Ensure adequate water intake throughout the day.
• Dietary Restrictions: Adjustments may be needed for allergies, intolerances, or specific dietary preferences (e.g., vegetarian, vegan).
• Activity Level: More active individuals may require higher calorie intake.
  
  
  

Vitamins

In addition to the basic food substances that are sources of energy and plastic material, food contains substances that do not provide energy but are necessary in minimal quantities to sustain life.   These include vitamins. These substances are essential because they are not synthesized or hardly synthesized by the body's cells. Their most important biological role is usually associated with the fact that they are part of biological catalysts of enzymes or hormones, which are powerful regulators of metabolic processes in the body. 

Currently, several dozen vitamins are known, but not all of them are necessary.

Based on their physical and chemical properties and the nature of their distribution in natural products, vitamins are usually divided into water-soluble and fat-soluble. The first group includes vitamin C (ascorbic acid) and a wide group of B vitamins (B1, B2, PP, folic and pantothenic acids, pyridoxine and others). The second group includes vitamins A, D, E and K. This division of vitamins is not accidental, it helps to find natural sources of their production in food and to understand how vitamins are absorbed in the intestine. Food products may contain not only vitamins but also their precursors, or so-called provitamins, from which the vitamins are formed in the body. A long-term lack of vitamins in the diet leads to a characteristic disease called avitaminosis, severe forms of which are rarely encountered today. Much more often, a doctor encounters so-called hypovitaminosis conditions, the development of which is associated with a lack of vitamins in food. In summer and autumn, food is richer of vitamins than in winter and spring. This is why hypovitaminosis states are seasonal and most commonly seen in winter and spring.

 It is known with increased physical and mental work, under the influence of unfavourable effects on the body, with overheating and hypothermia, under the influence of pathogenic factors, with impaired absorption of vitamins, as well as in such physiological conditions as pregnancy, child feeding the need for vitamins increases significantly.

Most hypovitaminosis is characterized by common signs: increased fatigue, weakness, apathy, decreased efficiency, fall resistance to colds and infectious diseases. But in addition to these general signs for each of the vitamins are known and specific signs of its deficiency.

• Vitamin A deficiency is characterized by deterioration of twilight vision: a person at dusk quickly loses orientation, sees objects indistinctly, and his visual reactions are slowed down.

Vitamin A deficiency is particularly dangerous for transport drivers. Taxi drivers, drivers of trams, trolleybuses, buses, electric locomotive drivers and others who work at night and in the evening should take care that there is enough vitamin A in their diet.

The yellow pigment pro-vitamin A, called carotene, contained in many fruits and vegetables plays a major role in meeting human vitamin A requirements. Large amounts of carotene are in carrots, red peppers, sorrel, green onions. Interestingly, the carotene content depends greatly on the colour of the vegetable. Red carrots have 9 times more than yellow carrots, and red peppers 50 times more than green peppers

Remember that vitamin A, like other fat-soluble vitamins, is much better absorbed with fat. This means that for a more complete absorption in the intestines it is advisable, for example, to stew the product in oil beforehand.

• Bread and cereal products are the primary sources of Vitamin B. It should be borne in mind that the main amounts of this vitamin are contained in the outer layers of the grain, most of which are lost in the production of higher grades of flour, polished rice and other refined products. Therefore, bread products made of coarse flour, especially bran, have a higher vitamin value. 

Since vitamin B1 is highly soluble in water and easily oxidized by oxygen, long soaking of foods or leaving them in the air in crushed form should be avoided to preserve it.

• Deficiency of Vitamin B2 (riboflavin) is manifested in growth retardation, disorders of the skin and mucous membranes (formation of cracks, ulcers in the corners of the mouth, peeling skin, inflammation of the mucous membranes of the eyes, etc.). The adult requirement for this vitamin is 2.5-3.5 mg per day. Good sources of vitamin B2 are milk, cottage cheese, cheese, eggs, liver, meat: especially yeast.
  
  
• Vitamin C deficiency is manifested in inflamed gums, increased fragility and bleeding of blood vessels, and reduced resistance to colds and infectious diseases. Biochemical studies show that low ascorbic acid content in the blood, especially in the winter-spring period.

An adult's vitamin C requirement is 70-100 mg per day, depending on the nature of the work. An excellent source of vitamin C is blackcurrant, red rose hips, red pepper, green onions, cabbage and other vegetables, berries and fruits. When vegetables are processed, vitamin C is destroyed relatively quickly, so it's important to know the correct cooking methods. Vitamin C is readily soluble in water and has little resistance to oxygen and heat.

• Calcium and phosphorus are very important components of food. They form the mineral basis of the skeleton, which is why their requirements are particularly high during the growth period. Calcium is also necessary for normal nervous system excitability and muscle contractility. Occurring in the disease of the parathyroid glands seizures are associated with a sharp decrease in calcium in the blood. In addition, calcium serves as an activator of some enzymes.

An adult person should receive approximately 0.8-1.0 g of calcium per day; children and teenagers 1-2 g, pregnant women and breastfeeding mothers - up to 2 g. The degree of calcium absorption depends on its correlation with other salts, especially phosphates and magnesium, as well as on the body's supply of vitamins and magnesium. The degree of calcium assimilation depends on its correlation with other salts, especially with phosphates and magnesium, as well as on the provision of the organism with vitamins and magnesium, and in particular on the provision of the organism with vitamins of the D group. It is no coincidence that milk and dairy products are excellent sources of easily digestible calcium and phosphorus. Practically half a litre of milk or 100 g of cheese satisfies the daily calcium requirement of an adult.

Of the trace elements - substances that in very small amounts (mg or even fractions of mg) are necessary for maintaining health is iron, the most important component of haemoglobin. On average, an adult should receive about 15 mg of iron daily. The main sources of iron are meat products, especially liver and lungs, and specialised products enriched with blood. The advantage of these products over other foods is that the organic iron compounds they contain are much better absorbed by the human body.

No matching results, press enter to execute your custom prompt Of the trace elements - substances that in very small amounts (mg or even fractions of mg) are necessary for maintaining health is iron, the most important component of hemoglobin. On average, an adult should receive about 15 mg of iron daily. The main sources of iron are meat products, especially liver and lungs, and specialized products enriched with blood. The advantage of these products over other foods is that the organic iron compounds they contain are much better absorbOf the trace elements - substances that in very small amounts (mg or even fractions of mg) are necessary for maintaining health is iron, the most important component of hemoglobin. On average, an adult should receive about 15 mg of iron daily. The main sources of iron are meat products, especially liver and lungs, and specialized products enriched with blood. The advantage of these products over other foods is that the organic iron compounds they contain are

No matching results, press enter to execute your custom prompt Of the trace elements - substances that in very small amounts (mg or even fractions of mg) are necessary for maintaining health is iron, the most important component of hemoglobin. On average, an adult should receive about 15 mg of iron daily. The main sources of iron are meat products, especially liver and lungs, and specialized products enriched with blood. The advantage of these products over other foods is that the organic iron compounds they contain are much better absorbed by the human body.

Balanced diet

The problem of human nutrition, the production of sufficient quantities of tasty and healthy food to meet the needs of different population groups, has always been at the centre of attention.

Countries produce a huge amount of products: meat, fish, eggs, vegetables and fruits. However, we don't always know how to properly dispose of this huge national wealth, and how to treat it with care and rationality. This blog should help you make better and fuller use of food, and make it tastier and healthier.

Nutrition should be balanced

It is known that the body of an adult weighing about 70 kg contains about 40 kg of water, 15 kg of protein, 7 kg of fat, 3 kg of mineral salts and 0.7 kg of carbohydrates.

But the body is not a warehouse where everything is stored unchanged. The human body is constantly undergoing metabolic processes, some substances are burned, oxidized, excreted, and in return new substances are needed, and for various purposes.

Proteins, fats, carbohydrates, mineral salts and vitamins are the basic substances needed for life. Of course, the purpose of each of them is different.

Caloric content of the diet

Each of us should receive as much energy as it spend during the day,  in the body should observe energy balance. When a person does not receive calories compared to energy expenditure, he or she becomes thin.

 In cases where the inflow of energy with food exceeds the body's energy expenditure, fat deposition is inevitable. Excess weight is harmful, it drastically reduces fitness, reduces efficiency, worsens well-being, and spoils the figure.

 Unfortunately, many people underestimate the harm that obesity causes and sometimes believe that fat accumulation is a sign of health.  Obesity is a disease of overeating and fat metabolism that is nowadays very widespread.

Protein

Proteins are the most important component of nutrition. Proteins are the basis for the structural elements of cells and tissues. Proteins are associated with the basic manifestations of life: metabolism, muscle contractions, nerve irritability, the ability to grow and reproduce, and even the highest form of matter movement - thinking. By binding significant amounts of water, proteins form dense colloidal structures that determine the configuration of the body. In addition to structural proteins, protein substances include haemoglobin - the carrier of oxygen in the blood, enzymes - the most important accelerators of biochemical reactions, some hormones - subtle regulators of metabolic processes, nucleoproteins - substances that largely determine the direction of protein synthesis in the body, which are carriers of hereditary properties.
We can get the necessary amount of proteins from meat, fish, milk, eggs, cheese, bread, potatoes, beans and peas.

Simple fats are made up of glycerol and fatty acids linked by ester bonds. They form the basis of such well-known products as butter, pork, lamb and beef tallow, various types of vegetable oils, margarine, etc. Fats are liquid at normal temperatures (vegetable oils) and contain a very large percentage of so-called unsaturated fatty acids. Unsaturated fatty acids include oleic, linolenic, arachidonic and other acids. The higher the unsaturated fatty acid content, the lower the melting point.

Studies have shown that the complete elimination of fats from the diet leads to serious health problems.  Because fats contain essential substances such as linoleic and arachidonic acids and some fat-soluble vitamins. Lack of essential fatty acids in diets leads to delayed development of the growing organism, disturbances in the structure and function of cell membranes, dryness and inflammation of the skin, disruption of the proper course of pregnancy, and other health disorders.

If bottles of vegetable oils are stored in contact with air for a long time, oxidation and polymerization products of unsaturated fatty acids may accumulate in them, which has negative effects on the body. Especially unjustified is their storage in open wide vessels, contributing to the contact of oil with air oxygen. The properties of vegetable oils are very unfavourably affected by prolonged heating, e.g. frying in the same oil many portions of pies, doughnuts, potatoes and other - culinary products. The thick tar-like products formed in this process can damage the liver and even cause the development of malignant tumours.
  

Carbohydrates 

Of all the food substances consumed by humans, carbohydrates are the main source of energy The pure carbohydrate is sugar. Honey, depending on its origin, contains 70-80% mono- and disaccharides. Its high sweetness is due to the significant content of fructose, the sweetness of which is about 2.5 times higher than glucose and 1.5 times higher than sucrose. Sweets, cakes, pastries, cakes, jams, ice cream and other sweets are the most attractive sources of carbohydrates and pose a clear danger to obese people. A distinctive feature of these products, which have been increasing rapidly in recent decades, is their high caloric content and low content of essential nutritional factors. 
 This is particularly true for athletes engaged in intensive physical training and people's appropriate level of sugar consumption varies based on several factors, including age, physical activity, and overall lifestyle. For young individuals, consuming 80-100 grams of sugar per day can generally be beneficial in strenuous physical labour, as their sugar requirements may be slightly elevated. 

However, it is crucial to ensure that these large quantities of sugar and sweets do not replace other essential nutrients, such as protein. For the elderly and those with sedentary lifestyles, the recommended sugar intake is about 50 grams per day.

The health concerns surrounding excessive sugar consumption have been well-documented. Increased sugar intake, particularly from sugar-sweetened beverages, has been linked to weight gain, dental caries, insulin resistance, fatty liver disease, type 2 diabetes, and cardiovascular disease. The American Heart Association has recommended limiting added sugar intake to no more than 200 calories per day,  equivalent to about 50 grams.