Combination of food in our diet is done for the following reasons:
1. Meat is an expensive protein food. So, economy can be brought substituting it partially by texturised soyabeans.
2. Better nutritive value cereals are deficient in lysine and pulses are deficient in methionine. Combination of cereals and pulses improve the nutritive content in the food.
3. Variety of cereals combine well with milk. They compliment and improve the protein and calcium content e.g., kheer, custard, dalia. etc.
4. For healthy living and desirable change in food habits for e.g. Iron and calcium content can be improved by combining greens with meat, paneer and potatoes e.g., mutton biryani, dal saag and vegetable rice.