What causes high Phosphorus and low FT4 thyroid?

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

If your Phosphorus is in between 2.5 mg/dL and 4.5 mg/dL 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 Phosphorus 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.

Normal range of Phosphorus : 2.5 - 4.5 mg/dL

Ideal values of Phosphorus depending on age :

Age	Ideal Phosphorus value
<5 years	2.7
5-10 years	2.916
10-15 years	3.149
15-20 years	3.401
20-25 years	3.673
25-30 years	3.967
30-35 years	4.284
35-40 years	4.257
40-45 years	4.23
45-50 years	4.203
50-55 years	4.176
55-60 years	4.149
60-70 years	4.481
70-80 years	4.452
80-90 years	4.423
90-100 years	4.395
>100 years	4.367

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

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

Some examples of conditions that increase or decrease Phosphorus levels include:

• Increased blood calcium
• Diabetic ketoacidosis (after treatment)
• Liver disease
• Rickets and osteomalacia (due to vitamin D deficiencies)
• Kidney failure

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

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.9612
5-10 years	1.0381
10-15 years	1.12115
15-20 years	1.21084
20-25 years	1.30771
25-30 years	1.41233
30-35 years	1.52532
35-40 years	1.64735
40-45 years	1.63681
45-50 years	1.62633
50-55 years	1.75644
55-60 years	1.7452
60-70 years	1.73403
70-80 years	1.72293
80-90 years	1.7119
90-100 years	1.70094
>100 years	1.69006

High Phosphorus and low FT4 thyroid can be caused by a lot of reasons. If you take Phosphorus and FT4 thyroid blood tests and the results are higher than 4.5 mg/dL for Phosphorus 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 Phosphorus and FT4 thyroid Tests Are Done :

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