Janet, the Colin Champ link is really good. Thank you for that. I had a friend, whom I hadn't seen for many years, who when I made contact again had just had a brain tumour diagnosed after having surgery and chemo for lung cancer. I tentatively suggested a keto diet as an adjunct to his other treatments. He got the go-ahead from his doctor and tried it. Sadly, two weeks later he died. This is purely anecdotal I know and proves absolutely nothing. Perhaps it might have done more good at an earlier stage, perhaps not. I think if I got a cancer diagnosis I would certainly try to go keto (at the moment I am just low carb and feeling many benefits from that).