Spices in used restaurants may not be pure and may contain added colours (which again are harmful) and other adulterants. When we use home ground spices we ensure purity of the spices.
When we cook at home hygiene precautions are taken which may not be so in the restaurants. This could give rise to smouldering intestinal infections and gastric ulcers in the long run.
When you cook at home you can control the quality of the flour, and spices .We can use whole grain, flour, pulses & pure home ground spices. The quality and quantity of the oil can be controlled.
When you cook at home you can wash the dals, pulses and grains well to remove the dirt & pesticides.
When you prepare salads at home you can wash or clean them well to remove dirt & germs.
There is no substitute for fresh home made, home cooked food!