I read the same report as you have, which did not make sense since it is a vegetable that is widely eaten here without effect. We ate it again today and before eating I went to ask my neighbor if she had hear the plant was toxic. She said that everyone down here eats it without getting sick. I think I received the answer from a friend who has biologist friends . I received a link to a report on the plant. Some species of this plant is widely eaten in Africa, India Malaysia, China and many other countries. Apparently they are many different varieties of this plant some dangerous and some not. I feel much better now than I have read this article as it did not make any sense that people were eating it without any effect here. Not only is it not dangerous but has some protective qualities against cancer. We went from thinking we were poisonning ourselves to finding a plant from Lourdes!