Thyroid Physiology

The thyroid is part of the endocrine system, the chemical messenger system made up of glands that produce and distribute hormones.  But it does not work alone. It is also part of a very important trio called the Hypothalamic-pituitary-thyroid axis, or HPT axis.  The functionality of this axis revolves around the thyroid because it produces hormones T3, T4, and Calcitonin. T3 and T4 are responsible for increasing metabolic function, pushing the cells in the body to work harder to increase body temp, heartbeat, use up food and produce energy, and improve concentration and reflexes. In children, it also supports growth and brain development. Calcitonin is specifically involved in calcium metabolism and bone health. In order for these thyroid hormones to be regulated properly, the entire axis must be involved. The hypothalamus detects low levels of thyroid hormones and produces a hormone of its own called TRH that is sent to the pituitary gland. The pituitary gland communicates to the thyroid whether the body needs more or less T3 or T4, then sends TSH to the thyroid and tells it to produce more thyroid hormones.  

Maintaining overall health and wellness through exercise and a nutritious, anti-inflammatory diet, especially as we age, will help to keep the thyroid healthy.  Additionally, iodine is one of the main building blocks for T3 and T4 and is essential for a happy thyroid.

Comments (2)

  • Loretta white on Dec 21, 2022

    Are there any herbs that can get your thyroid working right

  • Christine Deichler on Dec 21, 2022

    I love almanacs could you please let me know when I can pay for a paper copy??? Digital would be ok if it could be printed. I don’t have much time to read on line. I take care of my husband and not much sleep. So if you could send it with the bill I would be more then happy to pay it. Thank You!!!

Leave a comment