What are the normal levels for D3 and Vitamin D 1,25 hydroxy?

The optimal range of 1,25-dihydroxy vitamin D in adult men and women ranges from 18 to 64 and 18 to 78 picograms per milliliter, respectively, according to Mayo Clinic. The normal range for males and females less than 16 years of age is 24 to 86 pg/mL.

The Vitamin D Council recommends the 25(OH)D test; the blood test may orchestrated at a doctor's office or laboratory or done in-home by the patient.

Individuals with Vitamin D deficiency may experience a loss of bone density, increased risk of broken bones, muscle weakness and the bone-thinning disease osteoporosis, caution medical experts at Hormone Health Network.