Venkatapathy, your grand father should avoid spices, pickles, fried food items, very hot and very cold food, and alcohol. Bananas are good for his condition. There is no need to avoid milk and its products. Regular hours of breakfast, lunch, and dinner with snacks or milk during mid morning, mid evening, and bedtime are advised. What matters a lot-is it quality or quantity of food.
Tea is a central nerve system stimulant.
It causes gastric irritation. Even though it suppress appetite, if you consume too much of tea with milk and sugar the calorie intake will be more. Managing satiety is very important factor in sustaining any diet plan. You can take larger volume food of low calorie compared to the little food with high calorie. I was wondering what I should do to minimise my risk.