Ordering the Comprehensive Thyroid Assessment Test Kit | Canada
Ordering the Comprehensive Thyroid Assessment Test Kit helps check how your thyroid is working by measuring several hormones and antibodies. This test can show if your thyroid is making too much or too little hormone, which can affect your energy, mood, weight, and more. Interestingly, thyroid antibodies can be present years before symptoms appear, making early testing helpful for spotting changes before they cause problems.
When ordering this test, you get:
- Measurement of thyroid-stimulating hormone (TSH) to check if your thyroid is underactive or overactive
- Levels of free T3 and free T4, which show how much active thyroid hormone is in your blood
- Reverse T3, which can help explain symptoms when other thyroid levels look normal
- Thyroid peroxidase and thyroglobulin antibodies to check for autoimmune thyroid problems
- Results that can help your doctor adjust your treatment or medication if needed
Who Should Consider Thyroid Function and Antibody Testing
People who feel tired all the time, have trouble losing or gaining weight, or notice changes in their hair or skin may benefit from this test. For example, someone who has been feeling unusually cold, has dry skin, and is losing hair might want to check their thyroid to see if it is working as it should.
Ordering this test may also be helpful if you:
- Have a family member with thyroid disease
- Are experiencing mood changes, like feeling sad or anxious more often
- Notice swelling in your neck or a lump near your throat
- Have irregular periods or trouble getting pregnant
- Recently started a new exercise routine and feel more tired than expected, which can sometimes be linked to thyroid changes
Checking your thyroid can help find out if your symptoms are related to hormone levels, which can be measured and tracked over time. Delaying this test could mean missing early signs of thyroid changes, which may make it harder to manage symptoms or adjust treatment plans later.
Preparing for Thyroid Hormone and Antibody Screening
Fasting is not required for this test, so you can eat and drink as usual before your sample is collected. Always follow any instructions your doctor or healthcare provider gives you to make sure your sample is collected the right way and your results are as helpful as possible.
Labs Included When Ordering Your Comprehensive Thyroid Assessment Test Kit
| Test Name | Reference Range | What This Test Measures | Low and High Levels of This Marker |
|---|---|---|---|
| TSH (Thyroid Stimulating Hormone) | 0.4 – 4.0 | TSH is made by the pituitary gland and tells the thyroid to make hormones. It is the main marker for thyroid function. |
High levels mean the thyroid may be underactive (hypothyroidism).
Low levels mean the thyroid may be overactive (hyperthyroidism). |
| Free T4 (Thyroxine) | 0.8 – 1.8 | Free T4 is the main hormone made by the thyroid. It shows how much hormone is available for your body to use. |
High levels mean the thyroid is making too much hormone.
Low levels mean the thyroid is not making enough hormone. |
| Free T3 (Triiodothyronine) | 2.3 – 4.2 | Free T3 is the active form of thyroid hormone. It helps control how your body uses energy and affects many body systems. |
High levels mean the thyroid is overactive or converting too much T4 to T3.
Low levels mean the thyroid is underactive or not converting T4 to T3 well. |
| Reverse T3 | 8 – 25 | Reverse T3 is an inactive form of T3. It can increase when the body is under stress or illness, blocking active thyroid hormone. |
High levels mean the body may be under stress or not using thyroid hormone well.
Low levels mean the body is not making much reverse T3, which is usually not a concern. |
| Thyroid Peroxidase Antibodies (TPO) | <9 | TPO antibodies show if the immune system is attacking the thyroid. High levels are linked to autoimmune thyroid problems. |
High levels mean possible autoimmune thyroid disease, like Hashimoto’s or Graves’ disease.
Low levels mean it is unlikely you have autoimmune thyroid disease. |
| Thyroglobulin Antibodies (TGA) | <4 | TGA are antibodies that can show if the immune system is attacking thyroid tissue. They help find autoimmune thyroid problems. |
High levels mean possible autoimmune thyroid disease or thyroid inflammation.
Low levels mean it is unlikely you have autoimmune thyroid disease. |
Reference ranges may change slightly as labs update their standards and methods.
Comprehensive Thyroid Assessment Test Kit FAQ
Is there Comprehensive Thyroid Assessment Test Kit testing near me?
This is a home test kit, so you can collect your sample locally and use the draw location link at the top of the page for help. If you have symptoms like tiredness, mood changes, or unexplained weight shifts, having a nearby collection site makes it easier to get tested quickly and start finding answers.
How do I interpret the test results?
While your doctor should review your results, we also offer a one-on-one test results review with our clinical team to help you understand what your numbers mean and what steps to take next.
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 symptoms are related to thyroid changes, so you can get the right treatment sooner.
How often should I retest?
Most people retest every 6 to 12 months, or as recommended by their doctor, to track changes in thyroid hormone levels and antibody status. Regular testing helps you and your doctor see if your treatment is working or if your thyroid is changing over time.
How accurate is the test?
This test uses immunoassay and chemiluminescence methods, with a specificity of 98% and sensitivity of 97% for thyroid markers. TrueHealthLabs.com works with CLIA-certified and CAP-certified labs to maintain high-quality testing standards you can trust.
Important Notes
None.
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.
Why Customers Trust True Health Labs – What People are saying
Also rated 4.6 out of 5 based on 3452 ShopperApproved reviews- See all TrueHealthLabs.com reviews.
