Thanks for query,
To take more food is not important but take high protein balanced diet.
If you take more fat and carbohydrate
you may get flatulance and acidity problem.
Take more milk,pulses,eggs,green veggies and fresh fruits.
Add some dry fruits in your diet.
if you do not have appetite then you may take tab. Ciplactin
for some time.
Take less food but frequently.
Ok and bye.