nmol/L

ng/mL

Vitamin D Status

<30

<12

Associated with vitamin D deficiency, leading to rickets in infants and children and osteomalacia in adults

30 to <50

12 to <20

Generally considered inadequate for bone and overall health in healthy individuals

≥50

≥20

Generally considered adequate for bone and overall health in healthy individuals

>125

>50

Emerging evidence links potential adverse effects to such high levels, particularly >150 nmol/L (>60 ng/mL)