Our first article discussed the importance of selenium to immunity. Yet there is still another way in which selenium is required for optimal immune function. Selenium is needed by the thyroid gland, and optimal immunity depends on having a healthy thyroid. Hypothyroidism (an under-performing thyroid) impairs immune cells’ ability to respond to a threat. Hypothyroidism has become epidemic. According to Isaac Eliaz, MD, nearly 60 million Americans, mostly women, have thyroid issues; most often hypothyroidism. Many of these people are unaware they are hypothyroid, and this includes lots of people who have been assured by doctors that test results indicate that their thyroid function is normal. The standard thyroid test measures thyroid stimulating hormone (TSH). It is assumed that if not enough thyroid hormone is being produced, TSH will start going up in an attempt to force the thyroid to produce more. But that’s not always the case. If your TSH test is normal and you still hav…