NurseCe4Less.com

The best test for vitamin D is the serum 25-hydroxy vitamin D level. When levels are less than 20 ng/ml, than the person is deficient. The optimal level is unknown, but many agree that levels should be above 30 ng/ml. Levels over 30 ng/dl optimize intestinal calcium transport and parathyroid hormone levels plateau when vitamin D is somewhere ... ................
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