| ENCYCLOPEDIA INDEX |
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Injury Disease Nutrition Poison Symptoms Surgery Test |
| 1 2 5 A B C D E F G H I J K L M N O P Q R S T U V W X |
25-hydroxy vitamin D |
| Overview Risks Results |
| Alternative Names: |
| 25-OH vitamin D |
| Normal Values: |
| The normal range is 16.0 to 74.0 ng/ml. Normal value ranges may vary slightly among different laboratories. Note: ng/ml = nanograms per milliliter |
| What abnormal results mean: |
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Low 25-hydroxy vitamin D levels indicate a deficiency in vitamin D, either from lack of exposure to sunlight or lack of adequate vitamin D in the diet. Vitamin D deficiency may lead to low blood calcium levels (hypocalcemia), thin or weak bones (osteoporosis and osteomalacia), and high levels of parathyroid hormone (secondary hyperparathyroidism). High 25-hydroxy vitamin D indicates excess vitamin D (hypervitaminosis D) and is usually caused by too much vitamin D in the form of doctor-prescribed dietary supplements. This can lead to high calcium levels (hypercalcemia). |
Blood test |
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