I'm interested in what you choose to do and how it is working for you. My husband has Stage 4 GEJ Adenocarcinoma as well. He was diagnosed by accident in a CAC CT scan 3 months ago and has no symptoms. He is very good at sticking to a diet and we plan to incorporate FMD in his chemo regimen. We have read lots of research about fasting and it's benefits to not only stress the cancer cells to make them more susceptible to chemo, but also protect normal cells from chemo and that it also reduces symptoms from the chemo. My current quest is to find a version of FMD (meal plan) that is low in sugar and is not full of supplements (Prolan). We'd like to go whole-foods as much as possible. Outside the 5-day FMD cycle he follows a higher fat/protein KETO-type diet. He will be doing his second round of chemo (FOLFOX) today. First round of chemo was well tolerated with a home-grown very reduced calorie & low carb diet 2 days before and after. Fingers crossed. I get that it's hard to study this as it relies on the patient to follow a strict diet (we all falter with that!), but the theory has been around enough years (search The Warburg Effect) now that I wish I could see more results being posted. Note we are not getting support from our oncology nutritionist and so are flying solo, which just makes it that much more scary. Good luck to you and your husband! Would love to hear of your results with it.