General Thyroid Information     The thyroid is an endocrine
gland, a ductless organ that produces thyroid hormones (T3 T4)
and releases them directly into the bloodstream. These chemicals
regulate the functioning of virtually all cells in your body.
Your thyroid gland is a small, butterfly-shaped gland located at
the front base of your neck. When your thyroid produces thyroid
hormones and releases them into your bloodstream, the hormones
disperse throughout your body to regulate metabolism. In your
brain, T3 and T4 regulate neurotransmitters implicated in mood,
appetite, sexual function, and emotions.     Your thyroid
produces two different hormones, T3 and T4. Triiodothyronine T3
hormone is the most active form of thyroid hormone. Both thyroid
hormones are made up of two molecules of the essential amino
acid tyrosine, to which iodine is attached. The manufacture of
thyroid hormones requires several micronutrients including
selenium, a trace element, which is crucial for adequate thyroid
hormone production. B