The symptoms include
- General muscle pain and weakness
- Muscle cramps
- Joint pain
- Chronic pain
- Weight gain
- High blood pressure
- Restless sleep
- Poor concentration
- Bladder problems
- Constipation or diarrhea
The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D blood test. A level of 20 nanograms/milliliter to 50 ng/mL is considered adequate for healthy people. A level less than 12 ng/mL indicates vitamin D deficiency.
Treatment for vitamin D deficiency involves getting more vitamin D -- through diet and supplements. This is a form of vitamin D called ergocalciferol or calciferol. Vitamin D can be given as an injection or as a medicine (liquid or tablets).
Guidelines from the Institute of Medicine increased the recommended dietary allowance (RDA) of vitamin D to 600 international units (IU) for everyone aged 1-70, and raised it to 800 IU for adults older than age 70 to optimize bone health. The safe upper limit was also raised to 4,000 IUs.
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