Vitamin D 25-OH: level of 23 is technically insufficient- over 30 is preferred. Depending on what other symptoms or medical problems exist, the best way to boost your low Vitamin D with SUPPLEMENTS is either with daily Vitamin D3 (Cholecalciferol) 1,000-3,000 IU or weekly Vitamin D2 (Ergocalciferol) 50,000.
Answered 1/30/2015
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