Figure 7. National risk of zinc deficiency based on the prevalence of childhood stunting and the estimated prevalence of inadequate zinc intake.

Stunting data (low height-for-age) are for children less than five years of age in138 low- and middle-income countries. The estimated prevalence of inadequate zinc intake is based on the FAO national food balance sheet data, the composite nutrient composition database, IZINCG physiological requirements, the Miller Equation to estimate zinc absorption and an assumed 25% inter-individual variation in zinc intake.