I don't think the most recent studies say you should cut out soy but your doc may want you to not eat it for awhile after you take the medication because of absorbtion problems. i don't think its a definate fact, it's contraversial. I would ask your doctor and see what he thinks. Mine did not tell me to avoid it or to eat if a few hours later and I have Hashi's also. Good luck
It does seem that most people that are able to notice negative effects of soy have had Hashimoto or Graves for some time, thus their thyroid may be more inclined to greater inflammation vs someone just starting the disease.
- If you have an autoimune thyroid disease like Hashimoto or Graves disease, avoid soy when possible. Non-fermented (in USA) is the worst for you.
In Autoimmune thyroid , the thyroid is inflamed from the antibodies and you are at risk for more body inflammation in other areas. The thyroid level of inflammation gets re-disturbed with other hormone imbalances as it can no longer self adjust. The hormone output and free T levels are now regulated by the hormone replacement meds. Like a car that no longer has an adjustable gas pedal for hills, its now one speed. So anything else that can effect ANY hormone levels can mess with and increase inflammation in the thyroid. Soy messes with hormone levels, it mimics estrogen, that is the reason why some 'thyroidians' will feel their thyroid inflame , swell and hurt after consuming certain amounts of soy.
Thyroid issue? Then say no to soy, its that simple, but difficult to avoid. Your vegan, so that's more difficult for you. I will try to be nice and shelf my opinion on the vegetarian diet.
: )