“Corn has to be soaked in lime-water (alkaline) to release nutritional elements necessary for human consumption. Tortilla dough and hominy have all been treated with lime-water in the grain before cooking. then it is nutritious.”
Nixtamalization:
https://en.wikipedia.org/wiki/Nixtamalization
We used to eat corn out of the field all the time as a kid. No treatment required. My favorite was roasted on the cob.