Malnutrition & Dietary Disorders: Causes, Types & Effects

Key Definitions

Malnutrition

Malnutrition occurs when the body does not receive enough (or too much) of the nutrients it needs to function properly. It can result from:

• Undernutrition: Insufficient intake of calories or nutrients (e.g., stunted growth in children).
• Overnutrition: Excessive intake of calories or nutrients (e.g., obesity, diabetes).
• Micronutrient deficiencies: Lack of vitamins/minerals (e.g., anemia, scurvy).

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Protein-Energy Malnutrition (PEM)

PEM is a severe form of undernutrition caused by insufficient protein and energy intake. It manifests in two primary forms:

1. Marasmus

   • Cause: Chronic caloric deficiency (low protein + energy).
   • Symptoms:
     • Extreme wasting (loss of muscle and fat).
     • Edema (swelling) is absent.
     • IMAGE: marasmus child labelled diagram | A severely emaciated child with sunken eyes and no fat reserves
   • Affected Groups: Infants (6–18 months) due to poor breastfeeding or weaning foods.

2. Kwashiorkor

   • Cause: Protein deficiency with adequate (but poor-quality) calories.
   • Symptoms:
     • Edema (swollen belly, feet, face due to fluid retention).
     • Dull hair (loss of pigment).
     • Skin lesions (eczema-like rashes).
     • IMAGE: kwashiorkor symptoms labelled diagram | Child with swollen abdomen and peeling skin
   • Affected Groups: Older children (1–3 years) when weaned from breastmilk to low-protein diets.

Comparison Table: Marasmus vs. Kwashiorkor

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Micronutrient Deficiencies

Micronutrients (vitamins/minerals) are critical for growth, immunity, and metabolism. Deficiencies lead to specific disorders:

1. Iron Deficiency Anemia (IDA)

• Cause: Insufficient dietary iron or poor absorption (common in vegetarians).
• Symptoms:
  • Pallor (pale skin, lips, nail beds).
  • Fatigue, weakness, dizziness.
  • IMAGE: iron deficiency anemia symptoms | Pale conjunctiva and spoon-shaped nails (koilonychia)
• Prevention: Iron-rich foods (lentils, spinach) + vitamin C (enhances absorption).
• Real-World Example:
  • Nepal’s School Feeding Program: Provides iron-fortified biscuits to schoolchildren to combat IDA, which affects 50% of Nepali women of reproductive age.

2. Vitamin A Deficiency (VAD)

• Cause: Lack of beta-carotene (precursor) or vitamin A in diet.
• Symptoms:
  • Night blindness (nyctalopia).
  • Xerophthalmia (dry eyes → blindness).
  • Increased infection risk (weak immunity).
  • IMAGE: vitamin A deficiency symptoms | Child with corneal ulcers (bitot’s spots) in eyes
• Prevention: Orange fruits (mangoes), leafy greens, golden rice (biofortified).
• Real-World Example:
  • Daraz’s "Nutri-Foods" Section: Sells vitamin A-rich snacks (e.g., mango puree, sweet potato chips) marketed to mothers in rural Nepal.

3. Iodine Deficiency Disorder (IDD)

• Cause: Lack of iodine in diet (common in mountainous regions).
• Symptoms:
  • Goiter (enlarged thyroid).
  • Cretinism (severe mental/physical retardation in infants).
  • IMAGE: goiter in a child labelled diagram | Swollen neck due to iodine deficiency
• Prevention: Iodized salt (mandatory in Nepal since 2003).

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Dietary Disorders

Dietary disorders arise from imbalanced eating habits, psychological factors, or metabolic issues.

1. Obesity

• Cause: Excess calorie intake (high fat/sugar) + sedentary lifestyle.
• Effects:
  • Type 2 diabetes, hypertension, heart disease.
  • IMAGE: obesity risk factors | BMI classification chart (underweight to obese)
• Real-World Example:
  • Pathao’s "Healthy Meal" Option: Partners with restaurants to offer balanced meals (e.g., dal bhat with less oil) to combat rising obesity in Kathmandu (25% of adults obese).

2. Anorexia Nervosa

• Cause: Psychological disorder (fear of gaining weight).
• Symptoms:
  • Self-starvation, extreme weight loss.
  • Amenorrhea (loss of menstrual cycle in females).
  • IMAGE: anorexia nervosa symptoms | Extreme thinness with lanugo (fine body hair)
• Treatment: Nutritional counseling + therapy.

3. Diabetes Mellitus

• Cause: Insulin deficiency (Type 1) or insulin resistance (Type 2).
• Effects:
  • Hyperglycemia (high blood sugar) → organ damage.
  • IMAGE: diabetes blood sugar levels | Normal vs. diabetic glucose tolerance curve
• Real-World Example:
  • NEPSE’s "Healthy Diet" Guidelines: Encourages low-glycemic foods (e.g., whole grains, legumes) for employees to prevent diabetes (1 in 4 Nepalis has prediabetes).

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Causes of Malnutrition in Nepal

Malnutrition in Nepal stems from multifactorial issues:

1. Poverty: 20% live below poverty line; cannot afford nutritious food.
2. Lack of Awareness: Parents unaware of balanced diets (e.g., feeding only rice).
3. Food Insecurity: Monoculture (rice-based diet) lacks diversity.
4. Sanitation: Diarrhea (from poor hygiene) worsens nutrient absorption.
5. Climate Change: Crop failures reduce food availability.

Mermaid Diagram: Causes of Malnutrition in Nepal

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Worked Example: Calculating Protein Requirements

Scenario: A 5-year-old child in a rural village weighs 12 kg. Calculate their daily protein requirement using the FAO/WHO standard (1g protein/kg body weight/day).

Solution:

1. Protein need = 12 kg × 1 g/kg = 12 g/day.
2. Common local foods to meet this:
   • Lentils (masyo): 1 cup (200 g) = ~18 g protein.
   • Egg: 1 egg = ~6 g protein.
   • Milk: 1 cup (240 ml) = ~8 g protein.
3. Problem: Many families rely on dal bhat (rice + lentils), but rice alone provides <2 g protein/cup. Solution: Include vegetables (spinach, amaranth) or animal products (egg, milk).

Real-World Tie-In:

• eSewa’s "Nutri-Basket": Offers pre-packaged meals with lentils, eggs, and fortified cereals to rural families, addressing protein gaps.

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Food Safety and Malnutrition Link

Poor food safety worsens malnutrition:

• Contaminated water → diarrhea → nutrient loss.
• Spoiled food → nutrient degradation (e.g., vitamin C in vegetables).
• IMAGE: food safety hygiene practices | Handwashing and clean cooking utensils

Example:

• In Kathmandu’s slums, children with worm infestations (from contaminated soil) absorb 30% less iron, worsening anemia.

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In the Real World

1. Pathao’s "Healthy Rider" Program

   • Idea Used: Dietary disorder prevention (obesity, diabetes).
   • How: Riders are trained to promote balanced meals (e.g., "Skip fried snacks; choose dal bhat") via in-app notifications. Pathao partners with Nepal Health Research Council to track rider health metrics.

2. Ncell’s "Mero Swasthya" App

   • Idea Used: Micronutrient deficiency tracking.
   • How: Users input diet/symptoms (e.g., fatigue, pale skin) and get personalized iron/vitamin A recommendations. The app links to Nepal’s National Nutrition Program for subsidies on fortified foods.

3. Daraz’s "Nutri-Guide" for Pregnant Women

   • Idea Used: Protein-energy malnutrition prevention.
   • How: During checkout, Daraz suggests pregnancy meal kits (e.g., egg + spinach curry) with FAO-approved nutrient labels. Discounts are offered for orders including iodized salt and iron-fortified flour.

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Exam Tip

1. Compare PEM Types:

   • Always use the Marasmus vs. Kwashiorkor table in exams. Highlight edema (present in Kwashiorkor) and age groups (infants vs. toddlers).

2. Link Real Data:

   • Mention Nepal Demographic Health Survey (NDHS) stats:
     • 25% of Nepali children under 5 are stunted (PEM).
     • 40% of women have anemia (iron deficiency).
   • Example answer:

     "According to NDHS 2022, 1 in 4 Nepali children suffer from marasmus due to rice-heavy diets. Schools in Terai implement midday meals with lentils and eggs to combat this."

3. Case Study Approach:

   • For dietary disorders, describe a hypothetical scenario (e.g., a Pathao rider developing diabetes) and explain causes + solutions (e.g., switching to whole grains).

4. Visuals > Words:

   • Always draw the Marasmus/Kwashiorkor child comparison or blood sugar curve for diabetes. Examiners reward clear diagrams.

5. Nepal-Specific Focus:

   • Prioritize local examples (e.g., iodized salt program, school feeding schemes) over global ones. Use NDHS or WHO Nepal reports for data.

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Final Note: Malnutrition is not just hunger—it’s a silent epidemic in Nepal. Exams test your ability to connect symptoms to causes (e.g., swollen belly = Kwashiorkor) and propose solutions (e.g., fortify foods). See the problem, name the disorder, and suggest a fix—that’s the key!