When it comes to purchasing goods for my day to day life like groceries etc, I prefer ordering from supermarkets since almost all items we need are available in one place. I go after quality as well as rates. Now a days, everything has become a business and all types of businesses are out to exploit the public either in quality or in rates.
Both the local markets as well as the supermarkets or malls are selling the same stuff. So, how can you say which one is good from your health point of view? The only difference I find is that in supermarkets, they supply everything in a neatly packed packets. That's all. So, it does not mean that products purchased from supermarkets are good for health and those items sold in local shops are bad.