 You have to understand that cancer is a disease of growth. And I'll get into this in a second, which is sort of how to look at cancer, which is a second really sort of fascinating problem. So cancer is really like, you have to think of it as a new invasive species basically. The cancer cell has derived from your own cell, but it's become autonomous. So if you have breast cancer, that breast cancer is derived from your own normal breast tissue, same as the colorectal cancer. It's derived from a normal colon cell, but has become essentially autonomous, but still responds to growth factors. So if you are worried about cells growing, well, you need to lower growth signaling, which includes insulin. Insulin is a growth factor. So you look at breast cancer, which is one of the most well studied for insulin. Breast cancer cells have like six times the number of insulin receptors that breast cells do. So you'd say, why does breast cancer cell meet so many insulin receptors? Well, it runs on glucose. So you need lots of insulin receptors. So you can be very sensitive to insulin so that as soon as you get a little insulin, it opens everything up. Let's glucose flood into the cancer cells. In fact, if you grow cancer cells, and this was noted sort of 30, 40 years ago, and don't put insulin in. They basically die.