Paradoxes of the modern diet
Hygienic specialists state: dietary structure disorders are the main cause of worsening health indicators. This factor turns out to be significantly more weighty than the presence of harmful substances (xenobiotics) in food.
An analysis of the typical diet of a modern human (including the population of the Russian Federation) reveals a sharp imbalance of macronutrients and micronutrients. There is a pronounced excess of the following components:
- Animal fats.
- Simple carbohydrates.
- Table salt (consumption has increased manifold).
Simultaneously, a critical deficiency of essential elements is recorded:
- Complete protein and animal-derived products (as its main sources).
- Starch (consumption reduced by almost 2 times).
- Dietary fiber (content in the diet dropped 2–3 times or more).
- Fresh vegetables and fruits.
A natural consequence of this dietary behavior is the development of a total shortage of polyunsaturated fatty acids (PUFAs), indispensable (essential) amino acids, most mineral salts, and virtually all known vitamins in the population, leading to severe pathologies.
Specific alimentary deficiencies
The impoverishment of the grocery basket and the rejection of certain food groups predictably entail the development of specific alimentary deficiencies. The exclusion of specific foods immediately affects the biochemical status of the body:
- Meat: a deficiency of iron and crucial essential amino acids develops.
- Milk and dairy products: an acute shortage of calcium arises, as well as the amino acid lysine.
- Fruits and vegetables: the intake of vitamin C, folic acid, and rutin drops.
Combined deficiencies acquire special clinical significance. For example, the simultaneous shortage of calcium and vitamin C is directly associated with the development of osteoporosis. This pathology is accompanied by frequent bone fractures, which poses a critical threat to patients of the older age group (primarily individuals over 50–55 years of age).
Endemic iodine deficiency
The problem of iodine sufficiency in Russia has a pronounced geographical specificity (etiology). Soils in a significant part of the country are extremely poor in this trace element due to remoteness from seas and oceans. This causes an initially low iodine content in locally produced foodstuffs.
Historically, this problem was successfully resolved in the USSR thanks to the widespread use of iodized salt. However, currently, due to a sharp reduction in its production volumes, the threat of iodine deficiency has once again regained frightening relevance. The danger to health is colossal:
- Severe thyroid dysfunctions develop.
- A pronounced decrease in intellectual development (by 20–30% or more) is recorded in children, causing serious difficulties in mastering school curricula.
Multiple micronutrient deficiency
Data from large-scale regional studies conducted by the RAMS Institute of Nutrition confirm the presence of multiple micronutrient deficiencies in the Russian population. The list of the most deficient items consistently includes: vitamin C, B vitamins, folic acid, beta-carotene (which not only acts as a provitamin A but also has independent physiological significance), as well as the trace elements selenium and zinc.
Folic acid is of particular obstetrical and gynecological importance. The deficiency of this nutrient in a pregnant woman's diet catastrophically increases the risks of:
- Intrauterine fetal death.
- Formation of severe congenital malformations.
The conclusion is unequivocal: adequate nutritional status and compensation for folic acid deficiency must be strictly taken into account when planning a family.
Briefly: answers to topical questions
What specific diseases and syndromes develop with isolated vitamin C deficiency?
Vitamin C (ascorbic acid) deficiency leads to scurvy (scorbutus). Clinical manifestations include:
- damage to the gums and dental apparatus, bleeding gums;
- hemorrhages under the skin and mucous membranes;
- anemia.
These manifestations are associated with increased fragility and brittleness of blood vessels due to impaired collagen fiber formation.
What are the clinical manifestations and nosological forms of severe iodine deficiency in adults and children?
Severe iodine deficiency can lead to thyroid dysfunction, endemic goiter, and hypothyroidism.
- In children, the extreme degree of deficiency can lead to cretinism — gross irreversible disorders of physical and mental development. Disruptions in physical growth and development, and a decrease in intellectual development are also possible.
- In adults, thyroid hypofunction may manifest as myxedema — mucosal edema due to the accumulation of proteoglycans and water in the skin.
- Manifestations of hypothyroidism include weakness, apathy, drowsiness, feeling cold, weight gain, and a drop in body temperature.
What are the main dietary sources of polyunsaturated fatty acids (PUFAs) for the prevention of their deficiency?
The main dietary sources of polyunsaturated fatty acids (PUFAs) are plant-based foods, fish, and seafood. These include:
- vegetable oils — linseed, soybean, sesame, pumpkin, cedar, olive, and walnut oil;
- sunflower and pumpkin seeds;
- fatty marine fish and seafood, including herring, salmon, trout, other salmonids, caviar, and fish oil.
To memorize deficiencies due to a lack of plant foods: "Fruits Contain Rutin" (Folic acid, vitamin C, Rutin).
Class and exam questions
What causes more harm to health: toxic substances in food or an improper diet?
Experts acknowledge that dietary structure disorders (nutrient imbalance) are a more significant cause of health deterioration than the impact of harmful substances and xenobiotics.
What are the consequences of a combined calcium and vitamin C deficiency?
Such a combined shortage is closely associated with the development of osteoporosis, leading to frequent bone fractures, especially in patients over 50–55 years of age.
Why has the problem of iodine deficiency resurfaced in Russia?
Soils in the Russian Federation are initially poor in iodine. In the USSR, the deficiency was compensated by the mass production of iodized salt, but today, due to a sharp reduction in its output, the problem has returned.
What else to study on this topic
- The role of polyunsaturated fatty acids (PUFAs) in the prevention of metabolic disorders
- The pathogenesis of osteoporosis against the background of alimentary calcium and vitamin C deficiency
- The impact of iodine deficiency on cognitive functions and the mastery of school curricula in children
- Independent physiological functions of beta-carotene
- The role of zinc and selenium in the development of multiple micronutrient deficiency status
Master the entire topic in the "Hygiene" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on "Vitamins" plus 530 pages of subject material
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 95 video lessons for the subject
Other topics in "Chapter 5. Ecological and hygienic problems of population nutrition"
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