Yeah exactly. Cycads for example are a very poisonous plant. Yet there's an entire island in Japan where people use cycads for everything from flour to alcoholi

Yeah exactly. Cycads for example are a very poisonous plant. Yet there's an entire island in Japan where people use cycads for everything from flour to alcoholic beverages Maize is another good example of this. When white people took corn with them and forced parts of Africa to grow it from them, they didn't take along with them the knowledge of the complex process of nixtamalization. That's the way native peoples prepared corn to make it edible. It removes aflotoxins and makes nutrients in the maize more accessible. In areas in Africa where maize replaced what they'd been growing, famines skyrocketed because they didn't know how to eat/process the corn