Effect of vitamin A supplementation on childhood morbidity and mortality

Area of Science:

• Public Health
• Nutrition Science
• Pediatrics

Background:

• Vitamin A deficiency is a significant public health concern in developing regions.
• It is associated with increased morbidity and mortality in young children.

Purpose of the Study:

• To evaluate the impact of vitamin A supplementation on deficiency, common childhood illnesses, and mortality.
• To assess the efficacy of different vitamin A dosage regimens in children under 10 years.

Main Methods:

• A double-blind, randomized controlled trial involving 1520 children aged under 10 years in Chandigarh slums.
• Participants were randomized to receive vitamin A or placebo every 4 to 6 months for 15 months.
• Dosages varied by age: 500,000 IU for <6 months, 100,000 IU for 6-12 months, and 200,000 IU for >12 months.

Main Results:

• Vitamin A supplementation significantly reduced the prevalence of vitamin A deficiency compared to placebo.
• A significant reduction in the incidence of diarrhea and measles was observed in the vitamin A group.
• No significant difference in acute respiratory infection incidence was found, but the risk of death was significantly lower.

Conclusions:

• Vitamin A supplementation is effective in reducing deficiency and associated mortality in children.
• Regular supplementation at 4-6 month intervals should be prioritized in high-risk populations.
• Promoting vitamin A-rich diets is also crucial for preventing deficiency.