The best food often comes from your own backyard. Home gardens and homesteading farms are less common these days but certainly sustained the thriving nations for centuries.
Consider this: anything at the grocery store you could conceivably produce in your own backyard (given the freedom of time and friendlier HOA by-laws) is probably what you should eat. I’ve never seen a Teddy Grahams bush or livestock that gives Gatorade when milked.
If you couldn’t grow it, shepherd it, milk it, or harvest it in your own backyard then maybe you shouldn’t eat it.