There are some reports that fast mimicking diets (FMD) may be helpful, as in at least not harmful. This is NOT a 72 hour water only fast but more like the 2:5 diets where you fast for a limited number of hours 2 days out of 7. Mind you what I have read implies that FMD is good for all sorts of things, as this sort of limited fasting tricks the body into using reserves but without actually reducing anything too critical. However, I’d be discussing it with your oncologist first, if he/she can see no harm then an FMD may be worth a go. You are clearly determined and wanting to get all possible benefits, very best wishes with your treatment.