There's also been a number of studies done on what constitutes a "food desert" in the United States, where people don't have nearby access to a proper grocery store, just small convenience stores (and things like a strip mall with convenience store, liquor store, vape shop, etc). And as it correlates with obesity and health issues caused by an unhealthy diet.
https://www.google.com/search?client=firefox-b-d&q=US+low+in...