When a person has tendency to develop thyroid disorder- whether hypo- or hyper-thyroidism, it develops anyway irrespective of what the person eats. In Diet, high or low iodine
both cause thyroid disorders. So there is no point in avoiding foods which contain very minimal amount of iodine or goiterogenous items like cauliflower, cabbage, soya products. In fact, when these items are consumed cooked then the iodine literally is harmless.
Overall there are no dietary precautions nor any other lifestyle patterns to be followed to avoid the thyroid disorder.
Keep checking her TSH
, FT4 every 3 months to see where she'd have reached. And also get her anti-TPO and Anti-TSH receptor antibodies
done to give you clearcut idea which kind of hyperthyroidism
she will face- a temporary form or the one where she'll need preoper therapy to treat it. Get back to me with the results and further guidance.