Thyroid Stimulating Hormone

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The Thyroid Stimulating Hormone (TSH) test is a blood test that measures the level of TSH in your blood. TSH is produced by the pituitary gland and stimulates the thyroid gland to produce hormones that regulate your metabolism. The TSH test is used to evaluate thyroid function and diagnose thyroid disorders such as hypothyroidism and hyperthyroidism.

During the TSH test, a healthcare provider will use a needle to draw a small amount of blood from a vein in your arm. The blood sample is sent to a laboratory for analysis, where the level of TSH in your bloodstream is measured. The results of the TSH test can help your doctor determine if your thyroid is working normally or if you have an underlying thyroid condition that needs treatment.

The TSH test is a simple and effective way to evaluate thyroid function and diagnose thyroid disorders.

Price of test:£17

The lowest price from the last 30 days: £17

Awaiting result:

One day

Collect material:

Blood

Prepare:

Learn more

Purpose of the test

The Thyroid Stimulating Hormone (TSH) test is a valuable tool for evaluating thyroid function and diagnosing thyroid disorders. The test measures the level of TSH in your blood, which is produced by the pituitary gland and stimulates the thyroid to produce hormones that regulate your metabolism.

There are several reasons you may need a TSH test, including

- To diagnose hypothyroidism: Hypothyroidism occurs when your thyroid gland does not produce enough hormones, causing symptoms such as fatigue, weight gain, and depression. A TSH test can help diagnose hypothyroidism by measuring the level of TSH in your blood. If your TSH level is high, it indicates that your thyroid gland is not producing enough hormones.

- To diagnose hyperthyroidism: Hyperthyroidism occurs when your thyroid gland produces too much hormone, causing symptoms such as weight loss, anxiety, and a fast heartbeat. A TSH test can help diagnose hyperthyroidism by measuring the level of TSH in your blood. A low TSH level indicates that your thyroid gland is producing too much hormone.

- To monitor your thyroid replacement therapy: If you have been diagnosed with hypothyroidism and are taking medication to replace the missing hormones, a TSH test can help monitor the effectiveness of the treatment. Your doctor will use the test results to adjust your medication dosage as needed.

- To screen for thyroid disease: In some cases, a healthcare provider may recommend a TSH test as part of a routine blood test to screen for thyroid disorders. This is especially important if you have a family history of thyroid disease or if you experience symptoms such as fatigue or weight changes.

Detecting thyroid disease early with a TSH test can lead to better outcomes and a better quality of life. If left untreated, hypothyroidism or hyperthyroidism can lead to serious health complications, including heart disease, infertility, and osteoporosis.

The TSH test is an important tool for evaluating thyroid function and diagnosing thyroid disorders. It can help your healthcare provider monitor your health and adjust your treatment as needed. If you are experiencing symptoms of a thyroid disorder or have a family history of thyroid disease, talk to your healthcare provider about whether a TSH test is right for you.

Who Should Get Tested

The TSH test is indicated for a variety of people, including

- Newborns: All newborns are screened for congenital hypothyroidism, which can cause developmental delays if left untreated.

- People with symptoms of thyroid disease: If you are experiencing symptoms such as fatigue, weight changes, or mood changes, your healthcare provider may recommend a TSH test to evaluate your thyroid function.

- People with a family history of thyroid disease: If you have a family history of thyroid disease, you may be at increased risk for developing a thyroid disorder and may benefit from routine screening with a TSH test.

- People with an enlarged thyroid: An enlarged thyroid gland, or goiter, may be a sign of an underlying thyroid disorder. A TSH test can help diagnose the condition and guide treatment.

- People undergoing treatment for thyroid cancer: If you have undergone total thyroid removal for cancer and are taking levothyroxine (synthetic thyroxine (T4)), your healthcare provider may recommend regular TSH testing to monitor your treatment.

TSH testing is indicated for anyone who is at risk for or has symptoms of a thyroid disorder. Talk to your healthcare provider about whether a TSH test is right for you.

Blood Test Preparation Guidelines

Time of day

It is recommended to schedule your appointment for blood tests in the morning hours between 7:00-10:00.

Fasting

It is recommended to fast for approximately 12 hours before blood sampling. The last meal of the previous day should ideally be consumed around 6:00 p.m. On the day before the test, avoid heavy and fatty meals as well as alcohol.

Stay hydrated

Drinking water prior to testing can help with sample collection.

Other factors

Tests should not be performed after a sleepless night or intense physical activity. It is recommended to avoid exercise and stress immediately before blood collection and to not smoke. A short rest is recommended.

Medications and supplements:

Blood samples should be collected before the morning dose. Some drugs can interfere with test results. Consult with your doctor whether you can delay your dose because of lab tests.

Biotin supplements:

High doses of biotin supplements can affect test results, causing false elevation or reduction. It's recommended to avoid taking biotin for at least 72 hours before blood collection. If you are taking biotin, inform the personnel collecting the blood so that they can provide specific instructions.

Interpreting Test Results

The results of a TSH test show the amount of TSH in your blood and whether it is within normal limits, also called the reference range. Results are often reported in milliInternational Units per Liter (mIU/L).

The normal reference range for TSH levels may vary depending on the laboratory performing the test. In general, however, a TSH level between 0.4 and 4.0 mIU/L is considered normal for most adults.

If your TSH level is higher than the normal range, it may indicate an underactive thyroid (hypothyroidism). Conversely, if your TSH level is lower than the normal range, it may indicate an overactive thyroid (hyperthyroidism).

Please note that interpreting TSH test results requires clinical judgment and should be done by your healthcare provider. Your healthcare provider will consider your symptoms, medical history, and other factors when interpreting your test results.

To summarize:

- A TSH level between 0.4 and 4.0 mIU/L is considered normal for most adults.
- A higher than normal TSH level may indicate an underactive thyroid.
- A lower than normal TSH level may indicate an overactive thyroid.
- Interpretation of TSH test results requires clinical judgment and should be done by a healthcare professional.

If you have questions about your TSH test results or are experiencing symptoms of a thyroid disorder, talk to your healthcare provider about next steps.

Price of test:£17

The lowest price from the last 30 days: £17

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