If you are going to eat bananas in winter, then you may have a problem of cold and flu, so use less bananas.
To avoid cough and cold in winter, you should keep distance from sour fruits like orange, sweet lime.
To avoid problems like acidity in winter, you should eat less spicy food.
To increase your immunity in winter, you should stay away from cold water like cold drinks, things made of ice.
If you want to avoid diseases like obesity and blood sugar in winter, then you should avoid consuming too many sweet things.
To avoid dehydration and stomach problems in winter, you should avoid consuming carbonated beverages.
To maintain your health in winter, you should use less fried things like pakoras, kachoris etc.
You should also avoid consuming too cold food items like curd and buttermilk in winters as these things can increase sore throat and cold.
People consume more tea and coffee in winters which increases the risk of dehydration in their body.