Vitamin A Deficiency and Its Sources

A significant portion of the American population, approximately 42%, falls short of meeting their vitamin A requirements, which are essential for immune function, cell growth, and vision. The recommended intake for adult men is 900 micrograms, while adult women need 700 micrograms of retinol equivalents. Food sources rich in vitamin A include liver, which can exceed daily needs with a single serving, and plant-based options such as sweet potatoes and spinach. However, the conversion of pro-vitamin A from plant sources into active vitamin A varies among individuals, which may hinder some people's ability to meet their needs through a plant-centric diet.