Thyroid Function

Why is the Thyroid so important to not only survival, but to ensure optimum health? It's the first gland that forms in the fetus, and all tissues and cells need thyroid hormone. This is a short explanation.

Thyroid hormone is the first hormone to have evolved in multicellular organisms when they left the

iodine-rich atmosphere of the sea. Iodine was so essential. The thyroid evolved to make sure it was

always available to cells. The thyroid hormone controls all endocrine organs. The thyroid hormone

is the first hormone to develop in the fetus. First, the thyroid develops, then the central nervous

system develops, with the tissues from the neural tube making the thyroid and then the brain.

Iodine is essential for this. It is crucial not only to grow our brain but control development and

tissue growth. There are thyroid hormone receptors in all cell membranes, all mitochondria, and all

cell nuclei. The thyroid makes 80% t4, 16% t3, and 4% T2 and T1. In addition, 1% of the thyroid

makes 90% of the body’s calcitonin, important for regulating bone formation and vitamin D

activation in the kidneys. That T4 has to be converted into T3, T2, and T1 to be active. Thyroid

hormone, specifically T3, the active thyroid hormone, sparks the release of energy in all cells. All

nutrients, fats, proteins, and carbohydrates can be turned into ATP within each cell, using enzymes

in the mitochondria.

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