Hi welcome to HCM I have gone thru your query .It is a matter of pleasure that your wife has servived cancer after removel of cancerous thyroid followed by radiation . Regarding her medcation, I want to know , Why Synthroid is prescribed , after14 years of recovery ?. Did any problem occured? I suggest you ,pls keep your treating doctor aware of side effects if any . and keep going for regular check ups . By getting rid of the microbes in the organs, plus doing the normal cancer treatments, the balance (i.e. a strong immune system and a low number of cancer cells) is restored enough to keep the cancer from coming back. The patient is cured because their immune system has been regulated through well planned regimen . Because proper nutrition is an integral part of a healthy immune system, the kitchen is the perfect place to find natural home remedies to bolster your disease-fighting abilities. Regular intake of high fiber diet includinfruit veges ,whole grains oats , antioxidants- vitamins ,and minerals as ginger ,garlic onion , preferable in raw form , nutss - almonds ,walnut .flex seed, Avoid fried ,fast foods bakery products , tea coffee ,alcohol Lemon juice with water twice before meals , Bittergourd 25 ml in the morning coco nut water a great antioxident Turmeric powder 1/2 tspoon in a cup of hot milk . kills all types of bactirea on mass level. Do regular exercise , Walk, Yoga PRANAYAM -Deep Breathing for strengthening and detoxifying your system Proper rest and sound sleep helps rejuvination . Mental tention ,worry ,anger harms and encourages toxins in our body and damages our immune system . Constipation should not be encouraged Following above regimen will strengthen the vital force to help stay your metabolism balanced ,thus giving strength to immune system which assures happy healthy and disease free life ahead Hope this helps to solve your query Take care .All the best if any doubt Mail at Don t hesitate to get back for further query if any ?