Actually I shop at a place called Mercadinho Central. This is a teeny tiny shop on the corner where I live in Brazil. Her shop is about the size of most people's living room. She has 3 freezers, a couple chiller units and a little bit of racking.
If you think of what is actually essential that you purchase, you can probably eliminate most of what you buy.
I cook virtually everything from scratch. Other than the occasional can of corn, nothing comes in a can. No canned soups etc. Peanut butter I have to make if I want it.
When I buy a chicken, it isn't wrapped in plastic, she just pulls one out of the freezer. She usually has them in a shopping basket which has been placed inside the freezer. The head, feet, and offal are still attached. These parts are given raw to the dogs.
Some of the hygiene issues are questionable but I have yet to be ill nor has anyone I've know from the food. It just makes me wonder in first world countries, how much is propaganda to make people buy more (anti-bacterial ) cleaning products.
Just a thought.