Plants are full of defense mechanisms in the form of plant toxins. Even in humans, common/popular foods can contain oxalates which, despite being deemed relativ

Plants are full of defense mechanisms in the form of plant toxins. Even in humans, common/popular foods can contain oxalates which, despite being deemed relatively benign, can cause problems in some people: https://www.webmd.com/diet/foods-high-in-oxalates https://www.webmd.com/diet/foods-high-in-oxalates. It is interesting to think that this is a new potential plant defense mechanism, whose cause can be related to climate change, evolution, or some other unknown catalyst.