What does high FT4 thyroid and RBC mean in blood test?

High FT4 thyroid and RBC can be caused by numerous problems.

High levels of FT4 thyroid and RBC in the blood indicate a variety of health problems. If your blood FT4 thyroid level is between 0.89 ng/dL to 1.76 ng/dL and the RBC level is between 4.5 ng/dL to 5.5 mil/uL, then your body does not have any underlying health problems. But if FT4 thyroid and RBC levels exceed these levels, you should see a doctor immediately.

Normal FT4 thyroid range : 0.89 - 1.76 ng/dL

Age-wise ideal FT4 thyroid level in blood:

Age	Ideal FT4 thyroid value
<5 years	0.94349
5-10 years	1.00019
10-15 years	1.0603
15-20 years	1.12402
20-25 years	1.19157
25-30 years	1.26318
30-35 years	1.3391
35-40 years	1.41958
40-45 years	1.5049
45-50 years	1.59534
50-55 years	1.69122
55-60 years	1.68511
60-70 years	1.67903
70-80 years	1.67297
80-90 years	1.66693
90-100 years	1.66091
>100 years	1.65491

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

If you want your blood test report to be interpreted by FT4 thyroid specialist, then you can upload your report. Our FT4 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

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Total number of patients treated

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

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

If you want your blood test report to be interpreted by FT4 thyroid specialist, you can upload your report. Our FT4 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 RBC range : 4.5 - 5.5 mil/uL

Age-wise ideal RBC level in blood:

Age	Ideal RBC value
<5 years	4.77
5-10 years	5.057
10-15 years	5.361
15-20 years	5.341
20-25 years	5.322
25-30 years	5.303
30-35 years	5.284
35-40 years	5.265
40-45 years	5.246
45-50 years	5.227
50-55 years	5.208
55-60 years	5.189
60-70 years	5.17
70-80 years	5.481
80-90 years	5.461
90-100 years	5.441
>100 years	5.421

High FT4 thyroid and RBC levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 1.76 ng/dL for FT4 thyroid and more than 5.5 mil/uL for RBC, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a FT4 thyroid and RBC test. In most hospitals FT4 thyroid and RBC results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.