What causes high BUN and low GGT?

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

If your BUN is in between 6 mg/dL and 20 mg/dL and your GGT is in between 15 U/L and 85 U/L then you need not worry as these are the normal ranges for BUN and GGT 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 BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.062
5-10 years	6.124
10-15 years	6.187
15-20 years	6.251
20-25 years	6.315
25-30 years	6.38
30-35 years	6.446
35-40 years	6.512
40-45 years	6.579
45-50 years	6.647
50-55 years	6.715
55-60 years	6.784
60-70 years	6.854
70-80 years	6.925
80-90 years	6.996
90-100 years	7.068
>100 years	7.141

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

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Normal range of GGT : 15 - 85 U/L

Ideal values of GGT depending on age :

Age	Ideal GGT value
<5 years	15.154
5-10 years	15.31
10-15 years	15.468
15-20 years	15.627
20-25 years	15.788
25-30 years	15.95
30-35 years	16.114
35-40 years	16.28
40-45 years	16.448
45-50 years	16.617
50-55 years	16.788
55-60 years	16.961
60-70 years	17.136
70-80 years	17.312
80-90 years	17.49
90-100 years	17.67
>100 years	17.852

High BUN and low GGT can be caused by a lot of reasons. If you take BUN and GGT blood tests and the results are higher than 20 mg/dL for BUN and lower than 15 U/L for GGT, 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 BUN and GGT Tests Are Done :

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

Medical References

• Mayo Clinic – Blood urea nitrogen (BUN) test
• MedlinePlus – BUN (Blood Urea Nitrogen)
• Cleveland Clinic – Blood Urea Nitrogen (BUN): Testing, Levels & Indication