Vitaminsa Reference values
Vitamin B1 300-2400 (nmol/d)
Vitamin B2 200-1800 (nmol/d)
Vitamin B6 3.0-16.0 (μmol/d )
Vitamin B12 ---
Niacin 50-300 (μmol/d)
Pantothenic acid 10-60 (μmol/d)
Folate 15-80 (nmol/d)
Biotin 50-300 (nmol/d)
Vitamin C 150-2400 (μmol/d)
Table 2: Proposed reference values for urinary water-soluble vitamins in adults.