Cancer cells 'poison' the immune system with tainted mitochondria

It is well known that Metformin does what it does by modifying (in some sense -- I am not a cell biologist) the mitochondria. There is also some evidence that, in addition to helping the body to regulate blood glucose, Metformin reduces cancer risk.

Could it be that Metformin reduces cancer risk by reducing the ability of cancer cells to attack mitochondria?

fascinating , a war of critters, but then why and how do cancers growing on cancers use this.

Biological DDOS