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High CK, Lactate Dehydrogenase and CRN blood profiles.


Senior Member
I recently carried out a lot of blood tests but haven't had any discussion about the results. The testing department just labelled them as satisfactory.

I'm wondering if any members on the forum might have a good idea of what the results might signify and if there is any direction I should be going in?

The test results of interest are as follows;

Creatine kinase

Your Value: 252 IU/L

Standard Range: 26 - 140 IU/L

Flag: H

Lactate dehydrogenase

Your Value: 223 IU/L

Standard Range: 135 - 214 IU/L

Flag: H

C-reactive protein

Your Value: 7.5 mg/L

Standard Range: 0 - 5.0 mg/L

Flag: H


Your Value: 0.80 mmol/L

Standard Range: 0.87 - 1.45 mmol/L

Flag: L


Senior Member
These are just a few results, were the others in normal range ?
With low phosphate, you may want to check why, it may not be a simple deficiency. Everything has phosphate.

I would check PTH, ( parathyroid hormone levels), FGF23, a bone derived hormone that lowers phosphate.
Is vitamin D low? Other electrolytes should be compared.


  • Calcium, phosphate, magnesium, plasma proteins - in the presence of low phosphate:
    • High calcium suggests hyperparathyroidism.
    • Low calcium suggests lack of vitamin D or malabsorption, or hungry bone syndrome.
    • Low magnesium suggests dietary deficiency.
    • Consider paraproteinaemia if high globulins, severe hypophosphataemia with suspicious features such as anaemia, bone pain, renal dysfunction or hypercalcaemia.

  • Muscle weakness (diaphragmatic, cardiac and skeletal), bone pain, rhabdomyolysis, and altered mental status (confusion, hallucinations) are the most common presenting features.