Some of the conditions related to low thyroid function include weight gain, loss of muscle mass, confused speech, swollen neck, dementia, menstrual abnormalities, constipation, headaches, backaches, brittle hair, poor circulation and poor glucose regulation. Patients may also a thinning of the hair on the outer end of the eye brows (a sure, tell-tale sign of hypothyroidism).

By naturally stimulating the function of the thyroid glands, it may be possible to reduce symptoms of chronic hypothyroidism.

L-tyrosine is a precursor to the thyroid hormones T4 (thyroxine) and T3 (triiodothyronine). It is necessary to synthesize the inactive T4, which can then be converted into the active T3. Taking an L-tyrosine supplement may therefore increase thyroid hormone levels and alleviate some signs of hypothyroidism.

L-tyrosine is a precursor to the thyroid hormone thyroxine (T4). This hormone can also be converted into T3, which is the active form of thyroid hormone.

L-tyrosine also affects the pituitary gland’s signaling for increased production of thyroid stimulating hormone (TSH). This determines how much T3 and T4 the thyroid produces.

If using L-tyrosine for thyroid support, dosages of between 500 mg – 1000 mg, taken 2 or 3 times daily are recommended.

Tyrosine should not be taken with food to improve absorption from the intestinal track

L-tyrosine has received Generally Recognized as Safe (GRAS) status by the FDA in the United States. No serious side effects have been observed at dosage levels typically present in foods or at higher dosages of up to 12,000 mg per day.

In some cases, mild side effects of nausea, diarrhea, vomiting or headache have been reported at high doses.

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