What causes high FT4 thyroid and low Cholesterol?

High FT4 thyroid and low Cholesterol can be caused by many reasons.

If your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL and your Cholesterol is in between 125 mg/dL and 200 mg/dL then you need not worry as these are the normal ranges for FT4 thyroid and Cholesterol respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease FT4 thyroid levels include:

• Autoimmune disease
• A non-functioning thyroid gland
• Thyroiditis
• Diabetes
• Liver disease

Normal range of FT4 thyroid : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.91964
5-10 years	0.95026
10-15 years	0.9819
15-20 years	1.0146
20-25 years	1.04839
25-30 years	1.0833
30-35 years	1.11937
35-40 years	1.15665
40-45 years	1.19517
45-50 years	1.23497
50-55 years	1.27609
55-60 years	1.31858
60-70 years	1.36249
70-80 years	1.40786
80-90 years	1.45474
90-100 years	1.50318
>100 years	1.55324

*Ideal values are calculated based on our database of patient records

Normal range of Cholesterol : 125 - 200 mg/dL

Ideal values of Cholesterol depending on age :

Age	Ideal Cholesterol value
<5 years	41.332
5-10 years	41.332
10-15 years	41.332
15-20 years	41.332
20-25 years	41.332
25-30 years	41.332
30-35 years	41.332
35-40 years	41.332
40-45 years	41.332
45-50 years	41.332
50-55 years	41.332
55-60 years	41.332
60-70 years	41.332
70-80 years	41.332
80-90 years	41.332
90-100 years	41.332
>100 years	41.332

High FT4 thyroid and low Cholesterol can be caused by a lot of reasons. If you take FT4 thyroid and Cholesterol blood tests and the results are higher than 1.76 ng/dL for FT4 thyroid and lower than 125 mg/dL for Cholesterol, 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 FT4 thyroid and Cholesterol Tests Are Done :

If your doctor wants FT4 thyroid and Cholesterol tests on you, you may need to go through these tests. During the FT4 thyroid and Cholesterol 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 FT4 thyroid and Cholesterol Test reports by your pathologist.

Medical References

• MedlinePlus – Thyroxine (T4) Test
• Cleveland Clinic – T4 (Thyroxine) Test: What It Is, Function, Purpose & Levels
• MedlinePlus – Free T4 test
• WebMD – What Is a Thyroxine (T4) Blood Test?
• Mayo Clinic – Hypothyroidism (underactive thyroid) - Diagnosis and treatment