Brief Answer:
Hello. Adequate home cooked food is desirable

Detailed Answer:
Hello dear.
I understand your concern for the patient.

So in stage 4 disease chemotherapy or hormonal therapy should be given.
Along with that, adequate nutritional support is necessary. We encourage home cooked food which is hygienic in nature. Please avoid outside food. All fresh fruits can be eaten after proper washing and peeling.

Avoid underground fruits and vegetables.
Any protein supplement can be taken and any multivitamin supplement can be taken as advised by doctor.

Thanks and regards

---