What causes high Vitamin D and low GGT?

High Vitamin D and low GGT can be caused by many reasons.

If your Vitamin D is in between 75 nmol/L and 250 nmol/L 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 Vitamin D and GGT 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 Vitamin D levels include:

• Liver disease
• Celiac disease
• Your body isn’t properly absorbing or using vitamin D.
• Crohn's disease
• Kidney disease

Normal range of Vitamin D : 75 - 250 nmol/L

Ideal values of Vitamin D depending on age :

Age	Ideal Vitamin D value
<5 years	76.297
5-10 years	77.616
10-15 years	78.958
15-20 years	80.323
20-25 years	81.712
25-30 years	83.125
30-35 years	84.562
35-40 years	86.024
40-45 years	87.511
45-50 years	89.024
50-55 years	90.563
55-60 years	92.129
60-70 years	93.722
70-80 years	95.342
80-90 years	96.99
90-100 years	98.667
>100 years	100.373

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

Normal range of GGT : 15 - 85 U/L

Ideal values of GGT depending on age :

Age	Ideal GGT value
<5 years	15.259
5-10 years	15.523
10-15 years	15.791
15-20 years	16.064
20-25 years	16.342
25-30 years	16.625
30-35 years	16.912
35-40 years	17.204
40-45 years	17.501
45-50 years	17.804
50-55 years	18.112
55-60 years	18.425
60-70 years	18.744
70-80 years	19.068
80-90 years	19.398
90-100 years	19.733
>100 years	20.074

High Vitamin D and low GGT can be caused by a lot of reasons. If you take Vitamin D and GGT blood tests and the results are higher than 250 nmol/L for Vitamin D 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 Vitamin D and GGT Tests Are Done :

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

Medical References

• MedlinePlus – Vitamin D Test
• MedlinePlus – 25-hydroxy vitamin D test
• Mayo Clinic – 2425D - Overview: 25-Hydroxyvitamin D:24,25-Dihydroxyvitamin D Ratio, Serum