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Thyroid Supplements

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About Thyroid Supplements

The thyroid gland is located just beneath the Adam's apple, which can be easily seen on the throat of lean men. This gland synthesizes thyroid hormones, which play the important role of supporting the metabolism. When the thyroid gland is underactive and does not synthesize enough thyroid hormones, the metabolic rate significantly drops, creating a number of undesirable signs and symptoms. Sometimes, however, conversion of T3 to T2 and T4 to T3 outside of the thyroid gland can be reduced despite a normal and healthy thyroid gland. This can create the signs and symptoms of underactive thyroid, yet with a perfectly functional thyroid gland.



Common signs and symptoms of Hypothyroidism are:

* Low mood.

* Fatigue.

* Low body temperature or aversion to cold.

* Constipation.

* Dry skin.

* Puffy face.

* Muscular weakness.

* Poor memory.



When assessing a list such as this it is important to remember that each of these signs and symptoms can be caused by many different factors. For example, constipation may be caused by a low fiber diet and dry skin by an essential fatty acid deficiency. It is possible to have many of these indicators, yet with normal thyroid hormone levels. More signs and symptoms simply indicates an increased probability of thyroid hormone disturbance, yet still requires a need for testing and diagnosis.



There are many thyroid hormones, the most well known of which is T4 (thyroxine). However, T3 (Triiodothyronine) is an even more potent thyroid hormone than T4. T3 can be converted to T2 in the peripheral tissues. Importantly, for all of these hormones to be produced in the body, iodine is required. The number after each "T" tells us how many atoms of iodine are required for the structure of the molecule. For example, the T3 hormone contains three atoms of iodine, while T2 contains two iodine atoms. Tyrosine residues are prevalent within the protein structure of the thyroid hormones, which indicates an increased reliance upon this conditionally-essential amino acid for thyroid hormone production.



Adequate quality dietary protein is therefore essential for optimal thyroid hormone synthesis, particularly to provide ample phenylalanine, the essential amino acid that is used for the synthesis of tyrosine. Other nutrients, such as Selenium, are crucial as well, as is the mineral zinc. Selenium is required as an important cofactor for the deiodinase enzymes, responsible for the conversion of T4 to T3. Furthermore, Selenium is concentrated in the thyroid gland more than any other area of the body, and may assist in preventing autoimmune thyroiditis, as reported in the International Journal of Endocrinology, 2017.


Thyroid hormones are important for the breakdown of dietary carotenoids, such as beta carotene and alpha carotene. Beta carotene is composed of two retinol (Vitamin A) molecules joined together, which is an important source of Vitamin A for vegetarians, particularly vegans, who do not consume this nutrient directly through diet. An underactive thyroid gland may adversely impact carotenoid breakdown, leading to lower vitamin A status and hypercarotenemia.


A normal biosynthesis of thyroid hormones is essential for good health, vitality and an optimistic outlook on life. Supplements may assist in increasing your metabolic rate if your thyroid hormone levels are low, the two most important of which are iodine and tyrosine.