As one of the richest countries in the world, the United States infant mortality rate is higher than the other 27 wealthiest countries. Babies born in the US are 3 times more likely to die during their first year than one born in Finland or Japan.
The most common nutrient deficiency among infants and children worldwide is iron. Iron deficiency delays cognitive development. According to new data (NHANES 2007-2010), ~14% of US toddlers (1-2y) and 7% of children 1-5y are iron deficient.