My previous dog was a rescue that hadn't been spayed before going into heat, which eventually lead to breast cancer. (caninejournal.com)
The fat stored in your body can produce estrogen (which can also lead to breast cancer) or proteins that cause inflammation and insulin resistance, resulting in tumor cell growth. (mindbodygreen.com)
These increases in cancer were not related in any way to the caffeine content of the coffee, and the researchers concluded that excess coffee consumption leads to breast cancer via some unknown mechanism. (chestsculpting.com)