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What's the difference between over the counter vitamin D and prescription vitamin D?

1 answer | Last updated: Dec 12, 2011
Shell51 OH/IA asked...
What's the difference between over the counter vitamin D and prescription vitamin D? For low vitamin D level.
 

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Caring.com User - William Simonson
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Vitamin D is commonly available in two different forms; D-2 (ergocalciferol) and D-3 (cholecalciferol). Either one can be used to treat vitamin D deficiency although there is some evidence that See also:
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vitamin D-3 is more potent and more effective than vitamin D-2 in reversing vitamin D deficiency.

When someone is deficient physicians will often prescribe 50,000 International Units of vitamin D-2 to be given weekly for 8-12 weeks. That dosage is only available by prescription. After that initial therapy which should increase the vitamin D level to greater than 30 ng/ml the dose is typically reduced to a daily dose ranging from 1,000 to 2,000 International Units per day which can be purchased without a prescription. The Institute of Medicine states that the daily vitamin D dose for adults should not exceed 4,000 International Units per day.

 

 
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