About Sanguinaria canadensis, Wiki says: https://en.wikipedia.org/wiki/Sanguinaria

    Although limited laboratory research indicates potential for sanguinarine to inhibit the growth of cancer cells, there are no supportive clinical studies, and its use is discouraged due to adverse effects and potential toxicity.

It has been used by native Americans to treat cancer for a very long time but YMMV. It has worked for us.