What causes high Phosphorus and low BUN?

High Phosphorus and low BUN can be caused by many reasons.

If your Phosphorus is in between 2.5 mg/dL and 4.5 mg/dL and your BUN is in between 6 mg/dL and 20 mg/dL then you need not worry as these are the normal ranges for Phosphorus and BUN 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	2.678
5-10 years	2.868
10-15 years	3.072
15-20 years	3.29
20-25 years	3.524
25-30 years	3.774
30-35 years	4.042
35-40 years	4.329
40-45 years	4.307
45-50 years	4.285
50-55 years	4.263
55-60 years	4.242
60-70 years	4.22
70-80 years	4.199
80-90 years	4.497
90-100 years	4.474
>100 years	4.452

*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

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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 BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.426
5-10 years	6.882
10-15 years	7.371
15-20 years	7.894
20-25 years	8.454
25-30 years	9.054
30-35 years	9.697
35-40 years	10.385
40-45 years	11.122
45-50 years	11.912
50-55 years	12.758
55-60 years	13.664
60-70 years	14.634
70-80 years	15.673
80-90 years	16.786
90-100 years	17.978
>100 years	19.254

High Phosphorus and low BUN can be caused by a lot of reasons. If you take Phosphorus and BUN blood tests and the results are higher than 4.5 mg/dL for Phosphorus and lower than 6 mg/dL for BUN, 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 BUN Tests Are Done :

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