Yellow Maize, which is also known as corn, The difference between yellow and white maize grains is due to the color of the nutritive tissue which covers up the embryo in the seed, called the endosperm. Yellow corn is a good source of the carotenoids lutein and zeaxanthin, which are good for eye health and help prevent the lens damage that leads to cataracts. Corn also has smaller amounts of vitamins B, E, and K, along with minerals like magnesium and potassium. When it comes to nutrients, color matters. Many clinical studies have found that eating corn raw and using corn oil from corn for food will protect the heart.