Hello dear Julia If you have border line thyroid tests for 12 months ,that means that you are Ok and you dont need any treatement for the moment. Anyway i need to see the exact results of your thyroid tests to understand the function of your thyroid gland(if it has the predisposition to be hypo or hyperfunctionant) If there is a predisposition toward hypothyroidism i will suggest to include coconut oil,apple cider vinegar,fish oil,ginger,all types of vit B foods in your diet, for a healthy thyroid function.If the predisposition is toward Hyperthyroidism i suggest a diet with Omega3 fatty acids,broccoli,berries,cabbage. Attention(!):this is not a treatment for the thyroid condition but just as an adjunct treatment. Hope I have answered your question. If you have any further questions I will be happy to help. Wish you very good health. Dr Elona