What causes high Alkaline phosphatase and low BUN?

High Alkaline phosphatase and low BUN can be caused by many reasons.

If your Alkaline phosphatase is in between 30 U/L and 120 U/L 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 Alkaline phosphatase and BUN 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 Alkaline phosphatase levels include:

• Alcohol abuse
• Ulcerative colitis
• Blockage of the bile ducts.
• Insulin resistance
• Congestive heart failure

Alkaline phosphatase treatment - Click to read 10 GOLDEN ARTICLES on Liver health

Normal range of Alkaline phosphatase : 30 - 120 U/L

Ideal values of Alkaline phosphatase depending on age :

Age	Ideal Alkaline phosphatase value
<5 years	30.522
5-10 years	31.053
10-15 years	31.594
15-20 years	32.144
20-25 years	32.704
25-30 years	33.273
30-35 years	33.852
35-40 years	34.441
40-45 years	35.041
45-50 years	35.651
50-55 years	36.272
55-60 years	36.903
60-70 years	37.545
70-80 years	38.199
80-90 years	38.864
90-100 years	39.541
>100 years	40.229

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

Normal range of BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.104
5-10 years	6.21
10-15 years	6.318
15-20 years	6.428
20-25 years	6.54
25-30 years	6.654
30-35 years	6.77
35-40 years	6.888
40-45 years	7.008
45-50 years	7.13
50-55 years	7.254
55-60 years	7.38
60-70 years	7.508
70-80 years	7.639
80-90 years	7.772
90-100 years	7.907
>100 years	8.045

High Alkaline phosphatase and low BUN can be caused by a lot of reasons. If you take Alkaline phosphatase and BUN blood tests and the results are higher than 120 U/L for Alkaline phosphatase 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 Alkaline phosphatase and BUN Tests Are Done :

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

Medical References

• Cleveland Clinic – Alkaline Phosphatase (ALP): What It Is, Causes & Treatment
• Mayo Clinic – Alkaline phosphatase (ALP) blood test
• MedlinePlus – Alkaline Phosphatase
• WebMD – Alkaline Phosphatase (ALP): Tests and Results