I cannot help you much as this is not my branch but generally speaking
1. High fibre diet.
2. All naturally colored fruits and veg would help.
3.Curd and banana and papita
Dr Kiran Mehta.
Capcitabine tab cause nausea and vomiting so he must take adequate antiemetics as premedication. Anemia can be due to bleeding from the tumour. Please find out if he is passing black, sticky stool. Chemotherapy also can cause drop all components of blood. Put him on parenteral nutrition for a while so that he is not nutrionally depleted.