Micronutrient Adequacy and Developmental Resilience in Toddlers

Toddlers have high nutrient requirements relative to their body size, yet their dietary intake may be inconsistent due to appetite, selective eating and increasing independence around food. This makes toddlerhood a vulnerable period for micronutrient inadequacy. Nutrients of particular concern include iron, zinc, vitamin A, vitamin D, iodine and vitamin B12, which are involved in growth, immune function, neurodevelopment and bone health.

WHO highlights that many young children do not receive diets that are sufficiently diverse, safe or nutritionally adequate, increasing the risk of poor growth and developmental outcomes. ³ The WHO guideline on complementary feeding recommends diverse, nutrient-dense diets from 6 months of age, including animal-source foods, fruits, vegetables, legumes, nuts and seeds where culturally appropriate and safely prepared.¹

The PAHO/WHO guiding principles similarly emphasise the need to increase food variety, meal frequency and nutrient density as the child grows.² Where animal-source foods are limited, fortified foods, age-appropriate young-child products, or supplementation may help address nutrient gaps, provided their use is aligned with local guidance and individual clinical need. ¹

Micronutrient adequacy is central to toddler resilience. Inadequate intake of key vitamins and minerals may affect appetite, growth, immune defence and developmental progress, while nutrient-dense meals and snacks can help support the physiological demands of rapid cognitive, social-emotional and physical development.

References:

1. World Health Organisation. WHO Guideline for Complementary Feeding of Infants and Young Children 6–23 Months of Age. Geneva: World Health Organisation; 2023.
2. Pan American Health Organisation; World Health Organisation. Guiding Principles for Complementary Feeding of the Breastfed Child. Washington, DC: PAHO/WHO; 2003.
3. World Health Organisation. Infant and Young Child Feeding [Fact sheet]. Geneva: World Health Organisation; 2023.