Replied by Mama To Many (Tennessee) on 09/12/2015
Dear Mary,
I have used Apple Cider Vinegar for several years, even with a diagnosis of hypothyroid. I do also use Iodine, which keeps me symptom free of the low thyroid. As far as I can tell, the ACV has not had a bad effect on the thyroid issue. But that is just one person's experience.
If you are concerned, you could try another remedy - like turmeric.
~Mama to Many~