From: Vitamin D supplementation after the second year of life: joint position of the Committee on Nutrition, German Society for Pediatric and Adolescent Medicine (DGKJ e.V.), and the German Society for Pediatric Endocrinology and Diabetology (DGKED e.V.)
• > 100 ng/mL (> 250 nmol/L): intoxication
• 20–100 ng/mL (50–250 nmol/L): target area
• 12–20 ng/mL (30–50 nmol/L): subnormal
• < 12 ng/mL (< 30 nmol/L): deficiency