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Tyrosine is an amino acid used to produce thyroid hormones that regulate metabolism. Low levels of tyrosine are linked to hypothyroidism, but deficiencies are rare as it is found in many foods. Tyrosine supplements should be taken under a doctor’s supervision due to potential interactions with other medications.
The body uses phenylalanine to make tyrosine, which are amino acids or the building blocks of protein. According to experts, tyrosine and thyroid are closely related. Tyrosine aids in the regulation of thyroid hormone, as well as the function of the adrenal and pituitary glands. Along with iodine, the body uses tyrosine to produce thyroid hormones that keep the body’s metabolism running at its best. Low tyrosine levels have been associated with hypothyroidism, the clinical term for an underactive thyroid.
Some experts say that a tyrosine deficiency can increase the chances of hypothyroidism; however, tyrosine deficiencies are rare. Hypothyroidism is a condition in which a lack of thyroid hormones causes the body to slow down. Symptoms of this condition include weight gain, depression, constipation, and cold intolerance, as well as dry hair and skin. Severe hypothyroidism can also lead to anemia, mental confusion, and a serious and life-threatening condition known as myxedema, which can lead to coma. Untreated hypothyroidism in babies can even cause developmental delay.
Tyrosine deficiencies are apparently rare, as this amino acid is present in a variety of foods. While there is a link between low tyrosine levels and the thyroid, this amino acid is readily available in the average diet. Dietary sources of tyrosine include milk, cheese, yogurt, eggs, chicken, and turkey, as well as some legumes and seeds, such as lima beans, pumpkin, and sesame seeds. This amino acid can also be found in soy, wheat, and oat products.
Those who suspect a link between low tyrosine levels and the thyroid should first see a doctor for a blood test to confirm underactive thyroid function. This is especially important since the efficacy of over-the-counter tyrosine has not been conclusively proven as of 2011. There is a negative connection between tyrosine and the thyroid in people with hyperthyroidism or Graves’ disease, a condition in which the thyroid produces too much thyroid hormone For these people, tyrosine can increase thyroid function and worsen their disease.
Tyrosine is often recommended for people with a serious condition called phenylketonuria (PKU). People with this condition should avoid eating phenylalanine, the amino acid that makes tyrosine. Phenylalanine consumption can cause brain damage in those with PKU, so a specially formulated combination of protein and tyrosine is prescribed for these patients.
A doctor’s supervision is always recommended when taking tyrosine supplements. Interactions with other medications may occur, as tyrosine is known to interfere with certain antidepressants. According to some sources, this medication has also been associated with migraine headaches.
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