Mineral Deficiencies

Iron Deficiency Anemia - Rusty Pipes & Pale Faces

• Etiology: Dietary (low bioavailability, Indian diets), ↑ demands (growth), blood loss, malabsorption.

• Clinical Features: Pallor, fatigue, irritability. 📌 IRON: Reduced Hb, Oral (stomatitis, glossitis)/Odd cravings (pica), Nail (koilonychia).

• Diagnosis:

  • Hb < 11 g/dL (age-dependent).
  • Indices: MCV ↓, MCH ↓, MCHC ↓, RDW ↑.
  • Iron studies: S. Ferritin < 15 ng/mL (< 30 ng/mL with inflammation), S. Iron ↓, TIBC ↑, Transferrin Sat. < 16%.

  ⭐ Serum ferritin is the most sensitive and specific test for iron deficiency without inflammation.

• Management:

  • Oral: 3-6 mg/kg/day elemental iron; continue 2-3 months post-Hb normalization.
  • Parenteral: Severe anemia + poor compliance/malabsorption/oral intolerance.

• Prevention: Exclusive breastfeeding (6 months), iron-rich/fortified foods, prophylactic IFA supplementation (high-risk).

Iodine Deficiency Disorders - Thyroid's Tiny Terrors

• Spectrum:
  • Fetal: Abortions, stillbirths, anomalies.
  • Neonatal: Hypothyroidism, goiter.
  • Child/Adolescent: Goiter, impaired mental & physical dev.
  • Adult: Goiter, hypothyroidism, impaired mental function.
• Cretinism:
  • Neurological: Severe MR, deaf-mutism, spasticity.
  • Myxedematous: Dwarfism, myxedema, milder MR.
  • 📌 Mnemonic '6 P's': Pot-belly, Pale, Puffy face, Protruding umbilicus, Protuberant tongue, Poor brain development.
• Diagnosis:
  • Urinary Iodine Excretion (UIE): Population median < 100 µg/L (deficiency); Individual severe < 20 µg/L.
  • Neonatal TSH screening (↑TSH).
  • Serum: ↑TSH, ↓T3/T4.
  • Thyroid palpation/USG for goiter.
• Management:
  • Iodized salt (min. 15 ppm consumer).
  • Iodine supplementation (age-specific).
• Prevention:
  • Universal Salt Iodization (USI) - NIDDCP.
  • Monitoring: Salt iodine, population UIE.

⭐ Iodine deficiency during pregnancy and early childhood is the world's leading preventable cause of brain damage.

Zinc Deficiency - Growth's Missing Link

Etiology: Inadequate intake (phytates, low animal food), malabsorption (celiac, IBD), ↑losses (diarrhea, burns), ↑req (prematurity, growth). Clinical Features:

• Growth retardation/failure
• Diarrhea (acute/chronic)
• Dermatitis (acrodermatitis-like: periorificial, acral)
• Alopecia, Immune dysfunction (recurrent infections)
• Delayed wound healing, Hypogeusia/anorexia, Delayed sexual maturation. 📌 'ZINC DEF': Dermatitis/Diarrhea, Eye lesions/Emotional lability, Failure to thrive/Folliculitis, Infections (recurrent), Neuropsychiatric issues, Cutaneous lesions/Cell-mediated immunity ↓. Diagnosis:
• Serum zinc < 70 µg/dL (diurnal, inflammation)
• ↓ Alkaline phosphatase (zinc-dependent)
• Clinical response to supplementation. Management:
• Deficiency: Oral elemental Zn 1-2 mg/kg/day.
• Acute Diarrhea: 10 mg/day (<6mo), 20 mg/day (≥6mo) for 10-14 days.

⭐ WHO/UNICEF: Zinc for acute diarrhea reduces duration, severity, and future episodes. Prevention: Dietary diversification, fortification, supplementation.

Calcium & Other Key Minerals - Bone Builders & Body Balancers

• Calcium:

  • Role: Bone mineralization, nerve conduction, muscle contraction, clotting.
  • Deficiency (Vit D linked): Rickets, osteomalacia, tetany (Chvostek's, Trousseau's), poor growth.
  • 📌 'CATS Go Numb': Convulsions, Arrhythmias, Tetany, Spasms/Stridor, Numbness.
  • Sources: Dairy, ragi, green leafy veg.

• Copper:

  • Role: Enzyme cofactor (ceruloplasmin, lysyl oxidase).
  • Deficiency: Microcytic anemia (Fe-unresponsive), neutropenia, osteoporosis, depigmentation (Menkes: ATP7A gene).

  ⭐ Menkes disease: pili torti ('kinky hair'), growth failure, neurodegeneration (ATP7A mutation).

• Fluoride:

  • Role: Prevents dental caries, bone structure.
  • Deficiency: ↑ Dental caries. Excess: Dental/Skeletal fluorosis.
  • Optimal water: 0.7-1.2 ppm.

• Selenium:

  • Role: Antioxidant (glutathione peroxidase).
  • Deficiency: Keshan disease (cardiomyopathy), Kashin-Beck (osteoarthropathy).

High‑Yield Points - ⚡ Biggest Takeaways

• Iron deficiency: Most common; pallor, pica, koilonychia, ↓ ferritin. Screen 9-12 months.
• Zinc deficiency: Acrodermatitis enteropathica (rash, alopecia, diarrhea), growth failure, impaired immunity.
• Iodine deficiency: Hypothyroidism, cretinism (intellectual disability, goiter). Salt iodization is key.
• Copper deficiency: Menkes disease (X-linked, kinky hair); osteoporosis, neutropenia, anemia, neurodegeneration.
• Selenium deficiency: Keshan disease (cardiomyopathy), Kashin-Beck disease (osteoarthropathy).
• Fluoride: Deficiency ↑ dental caries; excess → dental & skeletal fluorosis.