T3/T4 Mix for Fat Loss The thyroid gland is located at the base of the neck and is known to release two key thyroid hormones, namely thyroxine or T4 and triiodothyronine or T3. The concentration of T4 released daily by the thyroid gland is higher than that of T3, as T4 acts as a precursor hormone to T3. In fact, it is estimated that the thyroid gland produces between 94 mcg and 110 mcg of T4 daily, while 40 % of this figure is converted into the T3 hormone. The hormones T3 and...

