Concerns and Needs in Diverse ContextsClass 11 Human Ecology and Family Sciences Part 1 Notes

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Nutrition, Health and Hygiene

Introduction

Everyone desires a good quality of life and a sense of well-being. The Universal Declaration of Human Rights (1948) states that everyone has a right to a standard of living that ensures health and well-being, which includes access to food. However, our environment and lifestyles often have harmful effects on our health.

The World Health Organisation (WHO) defines health as "a state of complete mental, physical and social well-being and not merely the absence of disease." A disease is an impairment of body health or a disruption in the normal function of a body part. Health is considered a fundamental human right for all people, regardless of age, gender, caste, religion, or nationality.

Health and its Dimensions

Health professionals aim to promote good health, which means maintaining wellness and a high quality of life. The definition of health includes three key dimensions: social, mental, and physical.

  • Social Health: This refers to the well-being of both individuals and the society they live in.

    • For society: It means equal opportunity and access to essential goods and services for all citizens.
    • For individuals: It refers to how well a person gets along with others and social institutions. This includes social skills and the ability to function as a member of society.
    • Social support from friends, family, and the community helps us cope with stress and problems. Studies show that socially well-adjusted people tend to live longer and recover faster from illness.
    • Social determinants of health include: Employment status, workplace safety, access to health services, cultural beliefs, and socio-economic conditions.
  • Mental Health: This refers to emotional and psychological well-being. A person with positive mental health:

    • Feels capable and competent.
    • Can handle normal levels of daily stress.
    • Has satisfying relationships and can lead an independent life.
    • Can cope with and recover from emotional stress.
    • Does not feel defeated or depressed for long periods over small problems.
  • Physical Health: This dimension covers physical fitness and the proper functioning of the body. A physically healthy person can perform normal activities without unusual fatigue and has adequate resistance to infection and disease.

Health Care

While individuals are responsible for their own health, it is also a major public concern. Governments provide health services because good health is the foundation for a good quality of life and is key to a nation's social and economic development.

Health care includes all services provided to individuals or communities to promote, maintain, monitor, or restore health. It consists of preventive, promotive, and therapeutic care, delivered at three levels:

  1. Primary Health Care: The first point of contact for individuals with the health care system.
  2. Secondary Health Care: When patients are referred from primary care to more specialised facilities, like district hospitals.
  3. Tertiary Health Care: When patients are referred from primary and secondary levels for specialised intensive care, advanced diagnostics, and serious medical treatment.

Indicators of Health

Since health is multidimensional, it is assessed using several indicators. These include rates of mortality (death), morbidity (illness), disability, nutritional status, and access to health care.

Nutrition and Health

Nutrition and health are deeply interconnected. Good nutrition is a "fundamental pillar" of human life, health, and development.

  • How Nutrition Supports Health: Good nutrition helps maintain body organs, supports growth, enables a person to resist infection, provides energy, and prevents fatigue. For children and adolescents, it is vital for growth and mental development.
  • How Health Affects Nutrition: A person's health status determines their nutrient needs. During illness, the body's need for nutrients increases, and nutrient breakdown is higher. Illness can therefore negatively affect nutritional status.

Nutrients

Food contains over 50 different nutrients, which are broadly classified based on the amount the body needs:

  • Macronutrients: Required in larger amounts. These include fat, protein, carbohydrate, and fibre.
  • Micronutrients: Required in small quantities. These include minerals (like iron and zinc) and vitamins. They often act as co-factors in metabolic reactions.

Nutrient requirements vary based on age, sex, physiological state (like pregnancy or adolescence), and level of physical activity. A balanced diet provides all necessary nutrients in the required amounts.

Note
The science of nutrition studies everything from how the body uses nutrients (clinical nutrition) to the nutritional problems of entire populations (public health nutrition).

Many factors influence our food choices, including:

  • Purchasing power (economic factors)
  • Environment (access to water for farming)
  • National policies
  • Culture, religion, social status, and personal beliefs

Malnutrition

Malnutrition is any deviation from a normal state of nutrition. It occurs when nutrient intake is either less than or in excess of the body's requirements.

  • Undernutrition: Caused by inadequate intake of nutrients.
  • Overnutrition: Caused by excessive intake of nutrients.

For adolescents, wrong food choices can be a significant cause of malnutrition.

Factors Affecting Nutritional Well-being

The WHO identifies four key factors for nutritional well-being:

  1. Food and Nutrient Security: Every person has access to adequate food and nutrients throughout the year to lead a healthy life.
  2. Care for those who are Vulnerable: Individuals who are vulnerable, such as babies, expectant mothers, and sick people, receive the loving care, attention, and support they need, including proper food and medication.
  3. Health for All: This includes preventing and curing diseases. Special attention is needed for infectious diseases like diarrhoea and measles, which can deplete the body of nutrients.
  4. Safe Environment: This includes access to safe drinking water, hygienic food, and prevention of environmental pollution.

Nutritional Problems and Their Consequences

India faces significant nutritional problems, including both undernutrition and overnutrition, a situation termed the "double burden of malnutrition."

  • Undernutrition: This is a major problem, seen in the high number of undernourished pregnant women, low birth weight babies, and stunted children.

    • Consequences: Reduced body weight, impaired cognitive development in children, weakened immunity, and disabilities like blindness (from Vitamin A deficiency) or mental retardation (from iodine deficiency).
    • Iron Deficiency: Impairs cognitive development, reduces physical activity, and in pregnancy, affects fetal growth and increases risks for the mother.
  • Overnutrition: Excess intake of nutrients can lead to toxicity, being overweight, or obesity.

    • Consequences: Obesity increases the risk of diseases like diabetes, heart disease, and hypertension.
    • According to the National Family Health Survey (NFHS-4), overnutrition is a growing problem, particularly in urban areas.

Nutrition and Infection

Nutritional status and infection are closely linked in a vicious cycle.

  • Poor nutrition weakens the immune system, increasing the risk of infection.
  • During an infection, the body loses nutrients (e.g., through vomiting or diarrhoea) and its nutrient requirements increase.
  • Loss of appetite during illness can lead to insufficient nutrient intake, which worsens nutritional status and increases the risk of another infection.

Hygiene and Sanitation

Preventing and controlling disease requires addressing both intrinsic (host-related) and extrinsic (environmental) factors. Key among these are sanitation, hygiene, and nutrition.

Hygiene has two main aspects:

  1. Personal Hygiene: Involves practices related to the body, clothing, and personal habits.
  2. Environmental Hygiene: Concerns external factors at home and in the community, such as safe water, air, housing, and disposal of waste.

Poor hygiene can lead to infections and infestations, such as worms. A safe environment, especially access to clean drinking water and proper disposal of feces, is crucial for preventing diseases like diarrhoea and worm infestations.

Food Hygiene

Food-borne illnesses occur when we eat food contaminated with disease-causing microorganisms. For an illness to occur, the pathogen or its toxin must be present in the food in sufficient quantity.

Common illnesses caused by poor food hygiene include diarrhoea, dysentery, typhoid, cholera, and gastroenteritis.

Poor food handling practices that lead to illness:

  • Using spoiled or unsafe food items.
  • Improper storage that allows microorganisms to multiply.
  • Not controlling insects and vermin.
  • Using contaminated utensils and equipment.
  • Inadequate cooking or reheating of food.
  • Storing cooked food at temperatures (4°C to 60°C) that favour microbial growth.
  • Cross-contamination between raw and cooked foods.
  • Leaving food uncovered.
  • Poor personal hygiene of food handlers (e.g., not washing hands).