GET OUT OF THE SUPERMARKET WHENEVER POSSIBLE. You won’t find any high-fructose corn syrup at the farmers’ market. You also won’t find any elaborately processed food products, any packages with long lists of unpronounceable ingredients or dubious health claims, nothing microwavable, and, perhaps best of all, no old food from far away. What you will find are fresh whole foods picked at the peak of their taste and nutritional quality—precisely the kind your great grandmother, or even your Neolithic ancestors, would easily have recognized as food.