Corn
The nutritional quality of corn is dependent on how it's prepared or pretreated. In Mexico it's generally alkali-treated with sodium hydroxide, which gives it niacin. There, it is usually made into corn tortillas. Eating corn with legumes creates a nearly complete protein. It contains more vitamin A than other cereal grains and most other edible seeds. And contains more antioxidants than any other cereal grain or fresh vegetable.