#preppercornstorage #cornnutrition Corn is naturally abundant in niacin (aka vitamin B3), which is an essential part of the human diet. However, the niacin in corn is chemically bound to other molecules, so we humans cannot properly absorb it. If you try to subsist on a diet based around nothing but corn prepared without alkaline treatment, you will develop niacin deficiency—which, it turns out, is pellagra.