Does your oncologist recommend lots of protein to keep weight on? Too much protein can be just as bad as too little, I've read
The kidneys and liver filter out excess protein and have read that excess protein consumption is a major risk factor for developing renal cancer. It seems backwards to recommend eating lots of protein, and put more burden on the kidneys?
Excess protein also cancels out the absorption of calcium. When we eat too much protein and not able to absorb calcium, the body needs to get it from somewhere, so it pulls it out of the bones, creating weak bones. With mets to bones, would think you'd want to keep them as strong as possible?
Might be a good idea to ask a nutrition expert. Maybe someone who deals with C patients frequently. Oncologists and MD's rarely have advanced education in nutrition, or any at all
For optimal nutrition while going thru treatment, it's hard to beat juicing fresh veg's such as kale, watercress, carrots, spinach/romaine, apples, wheat grass. For bulk and satisfying appetite, don't think there's anything wrong with starches such as potatoes, brown rice, whole grain pasta, and beans(in moderation, due to protein). For healthy fat when dealing with C, flaxseed oil is really good. Mixed in cottage cheese, this is the main part of the Budwig diet. For cooking, extra virgin coconut oil is supposed to be the heathiest oil on earth
Recommend referring to the work and books of Dr John McDougall, or Colin Campbell, PhD
good luck