My husband is two weeks post radiotherapy and oral chemo and is still experiencing severe diarrhea, not sure if this due to treatment or the cancer. He has lost tons of weight and naturally lacks energy to try and build himself up. He is due to see oncologist in four weeks. What I was wondering is would a diet which is lower in fats help? Diets for build up seem to be full of cream, full fat milk, butter etc. I think this is sort of diet may be too rich for a delicate system. Comments and personal experiences greatly appreciated.