Obesity is a factor in cancer, this article explains how that works - and the changes necessary to reduce risks. My favourite part of the article is where they explains the action of a drug trial:
Prof Lydia Lynch said: "A compound that can block the fat uptake by natural killer cells might help.
"We tried it in the lab and found it allowed them to kill again.
"But arguably a better way would be to lose some weight - because that is healthier for you anyway."
You mean a better diet and more exercise? Dammit, I was hoping for a pill!