cod liver oil capsules

Vitamin D Lab Test & Other Interactions

Vitamin D has an effect on the following lab tests:

  • Serum alkaline phosphatase
  • Blood calcium
  • Blood cholesterol
  • Blood phosphate
  • Serum magnesium
  • Urine calcium
  • Urine phosphorus

High vitamin D supplements can increase the levels of all the substances above, giving a false and incorrect results.

Supplementation with high vitamin D levels can cause lab test results of certain blood test to show incorrect results

Other Interactions with Vitamin D

Vitamin D has interactions with other substances as follows:

  • Alcohol
    People who drink excessive amounts of alcohol may have depleted stores of vitamin D in the liver and may need supplementation.
  • Olestra fat substitute
    People who take vitamin D supplements and eat the fat substitute olestra will decrease the absorption, effectiveness and action of the vitamin D supplements. It is advisable not to eat this fat substitute if taking vitamin D supplements.


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