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Selenium is also a vital constituent of the unique glutathione peroxidase antioxidants that protect the body against oxidative stress and all the complications that follow in its wake.
 Leading scientists recommend a daily selenium intake of at least 100 micrograms, which is a lot more than the majority of Europeans get. It takes around 100-125 micrograms daily to saturate selenoprotein P, which is a selenoprotein that is used as a marker of the body’s selenium status. 

our body must convert T4 into T3 (the active form) in order to use it. If the conversion of T4 to T3 is poor, then you may experience some of the common hypothyroid symptoms like fatigue, depression, sensitivity to cold temperatures, difficulty concentrating, and more.

uLet us Keep in mind, that this poor conversion can occur even if your TSH levels appear to be normal.

So, it’s important to assess the conversion of T4 to the active form of T3 to find the root cause of your symptoms and optimize thyroid function.

In times of chronic stress, your body releases higher amounts of a stress hormone called cortisol. At this time, your body is focused on the cortisol release, so it does not put much effort into converting T4 into T3. Instead, it redirects T4 to another hormone called reverseT3 (1).