What causes high FT3 thyroid and low FT4 thyroid?
High FT3 thyroid and low FT4 thyroid can be caused by many reasons.
If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL then you need not worry as these are the normal ranges for FT3 thyroid and FT4 thyroid respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.
Important - Go to the end of this article and read how our patients treated their abnormal FT3 thyroid levels
Normal range of FT3 thyroid : 2.3 - 4.2 pg/mL
| Age | Ideal FT3 thyroid value |
|---|---|
| <5 years | 2.381 |
| 5-10 years | 2.464 |
| 10-15 years | 2.55 |
| 15-20 years | 2.639 |
| 20-25 years | 2.731 |
| 25-30 years | 2.827 |
| 30-35 years | 2.926 |
| 35-40 years | 3.028 |
| 40-45 years | 3.134 |
| 45-50 years | 3.244 |
| 50-55 years | 3.358 |
| 55-60 years | 3.476 |
| 60-70 years | 3.598 |
| 70-80 years | 3.724 |
| 80-90 years | 3.854 |
| 90-100 years | 3.989 |
| >100 years | 4.129 |
*Ideal values are calculated based on our database of patient records
If you want your blood test report to be interpreted by FT3 thyroid specialist, then you can upload your report. Our FT3 thyroid expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now
1,37,160
Total number of patients treatedSome examples of conditions that increase or decrease FT3 thyroid levels include:
- Thyroiditis
- A non-functioning thyroid gland
- Autoimmune disease
- Diabetes
- Liver disease
If you want your blood test report to be interpreted by FT3 thyroid specialist, you can upload your report. Our FT3 thyroid expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now
Normal range of FT4 thyroid : 0.89 - 1.76 ng/dL
| Age | Ideal FT4 thyroid value |
|---|---|
| <5 years | 0.92115 |
| 5-10 years | 0.95339 |
| 10-15 years | 0.98676 |
| 15-20 years | 1.0213 |
| 20-25 years | 1.05705 |
| 25-30 years | 1.09405 |
| 30-35 years | 1.13234 |
| 35-40 years | 1.17197 |
| 40-45 years | 1.21299 |
| 45-50 years | 1.25544 |
| 50-55 years | 1.29938 |
| 55-60 years | 1.34486 |
| 60-70 years | 1.39193 |
| 70-80 years | 1.44065 |
| 80-90 years | 1.49107 |
| 90-100 years | 1.54326 |
| >100 years | 1.59727 |
Also Read : Symptoms of High FT3 thyroid
Also Read : Symptoms of Low FT4 thyroid
Can Low or High thyroid cause Heart Problems?
Read on to know how abnormal FT3 thyroid affects heart
Know moreHigh FT3 thyroid and low FT4 thyroid can be caused by a lot of reasons. If you take FT3 thyroid and FT4 thyroid blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 0.89 ng/dL for FT4 thyroid, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.
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How the FT3 thyroid and FT4 thyroid Tests Are Done :
If your doctor wants FT3 thyroid and FT4 thyroid tests on you, you may need to go through these tests. During the FT3 thyroid and FT4 thyroid blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your FT3 thyroid and FT4 thyroid Test reports by your pathologist.
Medical References
Medically Reviewed By
Dr. Hernandez, MD
Laboratory Medicine Specialist
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Laboratory Expertise:
- Clinical Pathology Certification
- 15+ years lab analysis experience
- Specializes in test interpretation
- Medical Advisory Board Member
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Medical Disclaimer: This information is for educational purposes and should not replace professional medical advice. Consult your physician for diagnosis and treatment. Read full disclaimer.
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