If it doesn’t come from the ground, I prefer not to eat it. I live by this , occasionally I eat pancakes or other stuff that it’s a little processed but if you focus on grains, herbs, fruits, and vegetables and protein, you will do well. Some towns have street markets where you can find healthy things, but the produce area in the supermarket is good as well
I would have thought a proper fruit and veg shop would be better to buy from than the supermarket. My local one sells lots of organic items and there are many items grown on nearby allotments. Hopefully this helps?