It's not true, it's not aristolochic acid but Aristolochic Lactam A II that's contained in Fishwort, and Fishwort is not a plant in the Aristolochia family. Fritillary has a lovely alias, called folding root. It is a wild vegetable, and this wild vegetable is still relatively widely distributed.

But don't think for a moment that fritillary, with its cute alias, is some kind of very tasty wild vegetable; in fact, fritillary tastes just like its real name, very unpleasant. Of course, it can not be said that it is very difficult to eat, it should be said that it has a very unique flavor.

After all, some people who love it can't get enough of it. To summarize, just like snail powder, those who love it, can't wait to eat it all the time, and those who don't love it, have to run away when they smell it.

So, there are people say, fishy grass actually contains a lot of aristolochic acid, eat will damage the kidneys, but also lead to a variety of cancers. Because aristolochic acid has indeed been recognized by international organizations as one of the carcinogens.

Then the problem is, aristolochic acid is usually found in plants of the Aristolochiaceae family, and Aristolochiaceae is not a member of the Aristolochiaceae family, but belongs to the Sambucus family of plants. Therefore, aristolochic acid does not exist in aristolochic acid.

Secondly, it's a mistake to talk about toxicity in terms of dosage, because aristolochic acid doesn't build up to a certain level and can't cause cancer. Additionally, there are many different causes of cancer, and the nuclear sewage and DDT discharged by some countries have long been shown to be carcinogenic. Of course, an international organization has listed it as a 2A carcinogen, and I don't know what the classification is.

As for a kidney disease called aristolochic acid nephropathy, it is indeed due to the intake of "too much" aristolochic acid, which then damages the cells of the renal tubules, causing necrosis and subsequent lesions. So why does this rumor exist?

It's actually because, Fritillary contains a substance called Aristolactam A II. Because the first three words are all Aristolochia, it will be used by some well-intentioned people to steal the concept. Therefore, fishy grass carcinogenic, pure nonsense.