hormone

One reason is insulin resistance - a condition where the body stops responding properly to insulin, the hormone that helps regulate blood sugar.

Possible treatments include chemotherapy, radiotherapy and drugs that help to stop the cancer growing - either by blocking hormones, boosting the body's immune system or targeting what makes cancer cells grow.

“That’s how they greet,” Ebsen told me a few weeks before, “their whiskers send signals straight up to their brain which tells them all about your smell, your hormones, everything.”

Researchers will test swimmers' saliva to track cortisol levels - a stress-related hormone - before and after cold water immersion.

Not everyone can do hormone therapy, which has really helped me.