How Many Americans Are Vitamin A Deficient? Prevalence and Risk Factors
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4 min read
While clinical vitamin A deficiency (VAD) is rare in the U.S., affecting less than 1% of the population, inadequate intake is a more widespread concern. Recent National Health and Nutrition Examination Survey (NHANES) data from 2005–2016 reveals a significant portion of the adult population does not meet the estimated average requirement for this crucial nutrient.