The lime helps the corn loosen its 'husk' as well... Nixtamalization also involves washing and husking the corn before grinding. The husk is the part that isn'

The lime helps the corn loosen its 'husk' as well... Nixtamalization also involves washing and husking the corn before grinding. The husk is the part that isn't digestible. More: https://en.wikipedia.org/wiki/Nixtamalization https://en.wikipedia.org/wiki/Nixtamalization