What causes high BUN and low Ferritin?

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

If your BUN is in between 6 mg/dL and 20 mg/dL and your Ferritin is in between 22 ng/mL and 322 ng/mL then you need not worry as these are the normal ranges for BUN and Ferritin 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	6.716
55-60 years	6.785
60-70 years	6.855
70-80 years	6.926
80-90 years	6.997
90-100 years	7.069
>100 years	7.142

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

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Normal range of Ferritin : 22 - 322 ng/mL

Ideal values of Ferritin depending on age :

Age	Ideal Ferritin value
<5 years	22.227
5-10 years	22.456
10-15 years	22.688
15-20 years	22.922
20-25 years	23.158
25-30 years	23.397
30-35 years	23.638
35-40 years	23.882
40-45 years	24.128
45-50 years	24.377
50-55 years	24.628
55-60 years	24.882
60-70 years	25.139
70-80 years	25.398
80-90 years	25.66
90-100 years	25.925
>100 years	26.192

High BUN and low Ferritin can be caused by a lot of reasons. If you take BUN and Ferritin blood tests and the results are higher than 20 mg/dL for BUN and lower than 22 ng/mL for Ferritin, 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 Ferritin Tests Are Done :

If your doctor wants BUN and Ferritin tests on you, you may need to go through these tests. During the BUN and Ferritin 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 Ferritin 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