Meanwhile, some reports have shown that the effects of estrogens on the thyroid gland may be indirect through the pituitary - thyroid axis [18] or as a consequence of increased serum levels of thyroxin binding globulin and the associated changes in thyroid function [23]. (bmcresnotes.biomedcentral.com)
I also take thyroxin for underactive thyroid, and have done for about 15 years. (drbriffa.com)
Hippocampus - dependent memory and allele - specific gene expression in adult offspring of alcohol - consuming dams after neonatal treatment with thyroxin or metformin. (sciencenews.org)