I want to describe to you a rather obscure tidbit pertaining to estrogen and its relationship to thyroid function. Low thyroid function is something that I talk a lot about because it affects a great many people weather they know it or not. Indeed the thyroid gland is very misunderstood and is certainly mistreated through the mainstream approach. But the thyroid gland itself aside, this article is focused on how thyroid hormone activity (not thyroid hormone production) can be hindered due to imbalances in the sex hormone estrogen.