Natural: If something couldn’t have existed 200 years ago, skip it. 2. Variable: If all units (chickens, eggs, tomatoes, etc.) are identical in size and shape, that’s a bad sign. 3. Flavorful: Intense flavor indicates nutrient density, but not when it comes from ingredients like sugar, MSG, or hydrolyzed protein. 4. Seasonal: Avoid foods that are frozen or canned. 5. Buy local: Packages should identify the source of the item.