Thyroid Test TSH fT3 & fT4
Merchant: Get Tested
Merchant's Category: All health tests
About Thyroid Disorders Thyroid disorders are more common among women than men and hypothyroidism affects 15-20% of women over the age of 50. If the thyroid doesn't create or release enough thyroid hormones, it will slow down your metabolism. An underactive thyroid can thus lead to weight gain, depression, tiredness and an increased sensitivity to cold temperatures. What is the thyroid feedback loop? The thyroid gland is part of the hypothalamic-pituitary-thyroid axis, and the thyroid hormone secretion is exerted by what is called a negative feedback loop. Thyroid-Releasing Hormone (TRH) from the hypothalamus stimulates the release of Thyroid Stimulating Hormone (TSH) from the pituitary. TSH controls the production of the thyroid hormones T4 and T3 where T4 is the inactive form that is converted to the active form T3. It is the active form that is used by the cells of the body. About a third of T4 is converted to T3 - provided we have a healthy liver, healthy gut flora and adequate nutritional levels (especially selenium and zinc. If you would like to measure your nutritional levels, we offer a Nutrition Test ). The conversion of thyroid hormones can be inhibited by factors such as heavy metals, environmental toxins, alcohol, cigarettes, inflammation, insulin resistance and certain drugs. Which thyroid functions are tested? The Thyroid Test TSH, fT3 & fT4 measures free T3, free T4 and TSH. If you would like to measure thyroid antibodies, we offer another thyroid test, Thyroid Test TPO , which measures three different types of antibodies. The presence of thyroid antibodies suggests that the cause of thyroid disease is an autoimmune disorder – specifically Hashimoto's disease. One can have normal levels of TSH, T3 and T4 and still have thyroid antibodies. Hypothyroidism (underactive thyroid), symptoms Tiredness Weight gain Being sensitive to cold Depression Constipation Dry skin Brittle hair and nails Brain fog Forgetfulness Hyperthyroidism (overactive thyroid), symptoms Tiredness Mood swings, anxiety and irritability Sensitivity to heat Heart palpitations Difficulty sleeping Swelling in your neck from an enlarged thyroid gland (goiter) Attention Intake of thyroid medication or supplementing with tyrosine or phenylalanine will affect the outcome of the test. How does the Thyroid Test TSH fT3 & fT4 work? The test is a blood test that is collected at home via a prick in the finger and then you squeeze out blood that you drip onto a piece of paper with circles that you fill with blood. The sample is then sent to the lab for analysis and you will receive your answer digitally as soon as the lab has analyzed your sample. Shipping to the lab is included in the price.
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The UKs biggest selection of health tests. Test your health from home, send your sample to our laboratory for analysis and receive results digitally. Without a doctor's visit.