Rocheford, a plant geneticist at Purdue, drew the attention of the U.S. Agency for International Development (USAID) for his research on variations affecting provitamin A carotenoids — naturally
occurring plant pigments that our bodies can convert to vitamin A — in maize.
If you're already saying «oh, kale yes» to dark leafy greens on a daily basis, here's more good news: Besides being packed with nutrients, foods like kale, spinach, and collard greens, also contain lutein, which are carotenoids, a naturally
occurring pigment in some
plants, reports a study published in Frontiers in Aging Neuroscience last December.