Ordering the Urine Thyroid (T3/T4) & Urine Iodine | Europe
Urine Thyroid (T3/T4) & Urine Iodine testing helps check how your thyroid is working and if your body has enough iodine. This test can help find out if your thyroid is making too much or too little hormone, which can affect your energy, weight, and how you feel day to day. Interestingly, urine iodine levels can show if your diet is missing this important mineral, which is needed for your thyroid to work properly.
Ordering this test can help you:
- Check if your thyroid hormone levels are too high or too low
- Find out if you have enough iodine in your body
- Spot early signs of thyroid problems before symptoms get worse
- Track how well your thyroid treatment is working
- See if your diet is giving you the right amount of iodine
Who Should Consider Thyroid and Iodine Urine Testing
People who feel tired, have trouble focusing, or notice changes in weight may benefit from this test. For example, someone who has been feeling more forgetful, has dry skin, and is losing hair might want to check if their thyroid or iodine levels are off.
Ordering this test may also be helpful if you:
- Have a family member with thyroid problems
- Notice swelling in your neck or have a goiter
- Experience changes in your heartbeat, like palpitations
- Have trouble with constipation or diarrhea that doesn’t go away
- Live in an area where table salt is not iodized, which can affect iodine intake
Checking these markers can help you find out if your thyroid is working as it should and if you are getting enough iodine, which can affect your energy, mood, and metabolism. Waiting to order this test could mean missing early changes that are easier to manage if caught sooner.
Preparing for Urine Hormone and Iodine Testing
Fasting is not needed for this test, but you should follow the instructions in your test kit for the best results. Always go by any directions your doctor or healthcare provider gives you to make sure your sample is collected the right way.
Labs Included When Ordering Your Urine Thyroid (T3/T4) & Urine Iodine
| Test Name | Reference Range | What the Test Measures | Low and High Levels of Urine Thyroid (T3/T4) & Urine Iodine |
|---|---|---|---|
| T3 (Triiodothyronine) | 0.2 – 0.5 µg/L | T3 is a thyroid hormone that helps control how your body uses energy. It is measured in urine to see how much your thyroid is making and releasing. |
High levels mean your thyroid may be overactive, which can cause fast heartbeat, sweating, and weight loss.
Low levels mean your thyroid may be underactive, which can cause tiredness, weight gain, and feeling cold. |
| T4 (Thyroxine) | 2.0 – 10.0 µg/L | T4 is another thyroid hormone that helps control your metabolism. Urine T4 shows how much hormone your thyroid is making over time. |
High levels mean your thyroid is making too much hormone, which can cause anxiety, trouble sleeping, and weight loss.
Low levels mean your thyroid is not making enough hormone, which can cause tiredness, dry skin, and slow thinking. |
| Iodine | 100 – 199 µg/L | Iodine is a mineral your body needs to make thyroid hormones. Urine iodine shows if you are getting enough from your food. |
High levels mean you may be getting too much iodine, which can sometimes affect thyroid function.
Low levels mean you may not be getting enough iodine, which can lead to thyroid problems and swelling in the neck. |
Reference ranges may change slightly if labs update their guidelines or methods.
Urine Thyroid (T3/T4) & Urine Iodine FAQ
Is there Urine Thyroid (T3/T4) & Urine Iodine testing near me?
This is a home test kit, so you can collect your urine sample locally and send it to the lab; check the draw location link at the top of the page. If you have symptoms like fatigue or brain fog, being able to collect your sample at home makes it easier to get answers without travel or long wait times.
How do I interpret the test results?
While your treating physician should review your results, you can also use our one-on-one test results review service with our clinical team for a clear explanation and next steps.
What is the cost of the test?
The price you see includes standard shipping to you and back to the lab, but draw fees may apply. Ordering this test can help you find out if your thyroid or iodine levels are affecting your energy or mood, so you can start feeling better sooner.
How often should I retest?
Retesting is usually recommended every 6 to 12 months, especially if you are starting or changing thyroid treatment or adjusting your diet. Regular testing helps you and your doctor track changes and make sure your thyroid and iodine levels stay in the right range.
How accurate is the test?
This test uses high-performance liquid chromatography (HPLC) and inductively coupled plasma mass spectrometry (ICP-MS) for precise measurement of thyroid hormones and iodine in urine, with specificity and sensitivity both above 98%. TrueHealthLabs.com partners with CLIA-certified and CAP-certified laboratories to uphold rigorous testing standards for dependable results.
Important Notes
READ: These tests are available for European countries only.
Medical Review Board
Reviewed by Jeff Donohue M.D. from Body Logic and Brady Hurst DC, CCCN. Written by True Health Lab’s team of editorial health contributors.
Disclaimer: This information is for educational purposes only and not intended as medical advice. Consult your healthcare provider for personalized guidance.
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