• The thyroid gland is a vitally important hormonal gland that helps to regulate numerous bodily functions. The organ is located in the front part of the neck below the voice box (larynx) and has the shape of a butterfly. The thyroid gland produces T3 (also known as triiodothyronine) and T4 (also known as tetraiodothyronine or thyroxine). The more biologically active hormone is T3. The thyroid gland produces mostly T4 and very little T3. To compensate for that, T4 from the thyroid is sent to the liver where an enzyme located their converts T4 into T3.

    Too little T3 can result in the following symptoms:

    •    Fatigue and drowsiness
    •    Difficulty concentrating
    •    Forgetfulness
    •    Depression
    •    Muscular weakness
    •    Dry, brittle hair and nails
    •    Dry, itchy skin
    •    Puffy face
    •    Constipation
    •    Sore muscles
    •    Weight gain
    •    Fluid retention
    •    Loss of sexual desire
    •    Weak erections
    •    Sensitivity to cold

    The optimal blood level of T3 is 3.2 to 4.2 pg/mL. If you are found to be suboptimal, a prescription thyroid medication called Nature-Throid is used. Nature-Thyroid provides a blend of T3 and T4. That way, if you’re not converting enough T4 to T3 in the liver, you’re covered. Also, if you’re not producing enough T4 in the thyroid gland, once again you’re covered with Nature-Throid. Medications like Synthroid or levothyroxine provide only T4, and may not fully correct low thyroid.