I wonder if they mean she has thyroiditis, which initially causes hyperthyroidism, but then hypothyroidism, eventually (but not both, simultaneously)? But I don’t think organic foods or a health retreat are going to correct that, but I am not a naturopath.
“Initially, inflammation of the thyroid causes a leak resulting in excess thyroid hormones (hyperthyroidism). Over time, the inflammation prevents the thyroid from producing enough hormones (hypothyroidism).“