Iron bioavailability as a protective factor against anemia among children aged 12 to 16 months

Area of Science:

• Nutrition Science
• Pediatric Health
• Public Health Interventions

Background:

• Anemia is a significant public health concern in infants, particularly among low socioeconomic populations.
• Nutritional interventions aim to improve health outcomes, but specific factors protecting against anemia require further investigation.
• Understanding the role of dietary iron and bioavailability is critical for preventing anemia in early childhood.

Purpose of the Study:

• To identify nutritional factors associated with the absence of anemia in infants from low socioeconomic backgrounds.
• To evaluate iron intake adequacy in infants participating in a nutrition intervention program.
• To determine the impact of dietary iron bioavailability on anemia prevention in infants.

Main Methods:

• A cohort study involving 369 infants in Brazil, randomized into intervention and control groups.
• The intervention group received nutritional guidance and monthly home visits during the first year of life.
• Anemia diagnosis was based on hemoglobin levels (<11 g/dL), with dietary assessment using 24-hour recalls and iron bioavailability classification.

Main Results:

• The prevalence of anemia was high at 63.7%.
• Non-anemic infants showed a statistically significant higher proportion of adequate iron intake (26.8% vs. 17.7%).
• Key protective factors included greater intake of iron, vitamin C, higher energy density at dinner, and diets with high iron bioavailability.

Conclusions:

• A diet characterized by high iron bioavailability is a protective factor against anemia in infants.
• Nutritional interventions focusing on iron-rich diets with enhanced bioavailability can be effectively implemented by health services and educational bodies.
• Improving dietary iron absorption is a viable strategy for public health initiatives aimed at preventing childhood anemia.