It's not only about avoiding spoiling, but making some plants edible in the first place [1] or making them more digestible [2]. 1: https://en.wikipedia.org/wik

It's not only about avoiding spoiling, but making some plants edible in the first place [1] or making them more digestible [2]. 1: https://en.wikipedia.org/wiki/Cassava#Preparation https://en.wikipedia.org/wiki/Cassava#Preparation 2: https://en.wikipedia.org/wiki/Nixtamalization https://en.wikipedia.org/wiki/Nixtamalization