[Dynseli]

But is PM really causing cancer/ cancerous tumors?

I don't know about pueraria m. But any herb that grows tissue and isn't anticancer/antitumor for that same tissue has a potential for also growing existing cancer cells, since both healthy and not healthy breast tissue have the same receptors. Such herb won't necessarily give you cancer, and its no more bad than what sugar does, it feeds tissue indiscriminately healthy or not. Anticancer herbs fight/prevent cancer while stimulating healthy tissue growth.