Thyroid Hormones

  • Thyroid refers to a group of hormones produced in the body.
  • The two main thyroid hormones are thyroxine or T4, and triiodothyronine or T3.
  • T4 is produced by the thyroid gland. It is the inactive thyroid hormone in the body.
  • T3 is produced by the thyroid gland and in the brain and liver via the conversion of T4. It is the active thyroid hormone in the body.
  • Thyroid hormones are involved in regulating the body's metabolism, increasing energy, and regulating the menstrual cycle.
  • This metabolic hormone decreases steadily with age.
  • Lack of thyroid hormone results in cold intolerance, fatigue, lassitude, weight gain, increased cholesterol, thin and dry skin, hair loss, thin and brittle nails.
  • Replenishment results in reversal of these symptoms plus increased energy and metabolism.

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Vivacity Clinic of Las Vegas

3365 E. Flamingo Road, Suite 2

Las Vegas, NV 89121





Office Hours

We are open during the following hours:


Monday-Friday: 9am - 5pm

Saturday: 8am - 12pm

Sunday: Closed


Patient Information

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