What causes high Phosphate and low Calcium?

High Phosphate and low Calcium can be caused by many reasons.

If your Phosphate is in between 2.4 mg/dL and 4.5 mg/dL and your Calcium is in between 8.5 mg/dL and 10.1 mg/dL then you need not worry as these are the normal ranges for Phosphate and Calcium 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 Phosphate levels include:

• Kidney failure
• Rickets and osteomalacia (due to vitamin D deficiencies)
• Diabetic ketoacidosis (after treatment)
• Increased blood calcium
• Liver disease

Normal range of Phosphate : 2.4 - 4.5 mg/dL

Ideal values of Phosphate depending on age :

Age	Ideal Phosphate value
<5 years	2.48
5-10 years	2.562
10-15 years	2.647
15-20 years	2.735
20-25 years	2.826
25-30 years	2.92
30-35 years	3.017
35-40 years	3.117
40-45 years	3.22
45-50 years	3.327
50-55 years	3.437
55-60 years	3.551
60-70 years	3.669
70-80 years	3.791
80-90 years	3.917
90-100 years	4.047
>100 years	4.181

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

Normal range of Calcium : 8.5 - 10.1 mg/dL

Ideal values of Calcium depending on age :

Age	Ideal Calcium value
<5 years	8.782
5-10 years	9.074
10-15 years	9.375
15-20 years	9.686
20-25 years	10.008
25-30 years	9.997
30-35 years	9.986
35-40 years	9.975
40-45 years	9.964
45-50 years	9.953
50-55 years	9.942
55-60 years	9.931
60-70 years	9.92
70-80 years	9.909
80-90 years	9.898
90-100 years	9.887
>100 years	9.876

High Phosphate and low Calcium can be caused by a lot of reasons. If you take Phosphate and Calcium blood tests and the results are higher than 4.5 mg/dL for Phosphate and lower than 8.5 mg/dL for Calcium, 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 Phosphate and Calcium Tests Are Done :

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

Medical References

• MedlinePlus – Phosphate in Blood
• WebMD – Phosphate Blood Test: Purpose, High vs. Low vs. Normal Levels
• MedlinePlus – Phosphate in Urine