The optimal level in serum, at least 75 nmol/l, can be reached by the dose of 800 – 1000 IU per day*.
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25(OH)D in nanomols per liter (nmol/l) |
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< 25 nmol/l |
Severe deficiency |
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25 – 49 nmol/l |
Deficiency |
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50 – 74 nmol/l |
Insufficiency |
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To reach 800-1,000 IU
Higher doses may be prescribed if you’ve been diagnosed with vitamin D deficiency.
Spending daily 20 minutes in the sun with 40 per cent of body exposed to the sun.
Eating vitamin D rich or fortified foods, but many experts claim this is not nearly adequate.
Separate Vitamin D supplementation is an easy way to meet daily needs.