Vitamin D Hydroxy (25-OH) Testing and Deficiency
25-hydroxy vitamin D blood test is done to check the vitamin D level in our body.
This form of vitamin is converted into a more active form by the kidney. This active form is directly responsible for controlling calcium and phosphorus levels in the blood.
The normal range for vitamin D 25-OH in blood is 30.0 to 74.0 nanograms per milliliter (ng/ml).
Symptoms Suggesting Vitamin D Deficiency
- Muscle pains in one or more muscle groups of the body. Pain may be in one muscle at some time and another muscle at some other time.
- Joint pain
- Weight gain
- Constipation or diarrhea
- Poor concentration
- Restlessness, during sleep
- Fatigue in general
Causes of Low Vitamin D Levels
Vitamin D deficiency is very common these days. There can be many causes for this. They are:
- Dietary deficiency of the vitamin
- Lack of exposure to sunlight
- Poor food absorption
- Liver or kidney diseases
- Certain medicines like, phenytoin, some barbiturates etc.