To have "nixtamalized" maize appears to be what ingredients lists call "processed with lime". Pellagra epidemics have arisen through failure to process with lim

To have "nixtamalized" maize appears to be what ingredients lists call "processed with lime". Pellagra epidemics have arisen through failure to process with lime. The Mayans got their cooking water from out of cenotes, skylights of limestone cave systems, which might have made it naturally nixtamalizing. Were their grinding stones of limestone? (The grinding platform, the metate, was not.) Don't know what the Navaho did or do.