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What Are the Normal Vitamin D Levels by Age?This test can indicate whether you have adequate levels, are at risk of a vitamin D deficiency, or have levels that are too high. Levels that are too low or too high could be harmful to your health.
These people may find themselves at risk of vitamin D deficiency, including: Children and teenagers: 600 international units (IU) or 15 micrograms (mcg). Adults up to the age of 70 years old ...
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