Thank you for your well-thought-out reply.
I haven't the slightest idea how to go about finding quality local foods. My strategy right now is to focus on high-quality superfood supplements, such as Living Fuel and Vitamineral Greens, because at least then I can be reasonably sure that they are filled with quality nutrients, even if they are not as ideal as actual fresh food.
Is there somewhere I can read more about the topics you were talking about? Somewhere like the Iodine supplementation FAQ page on CZ which is an incredible resource for learning about that topic.