Vitamins Normal Level Summary

• This table shows the levels of various vitamins in the blood.

Vitamin	Source	Another source	Functions of vitamin	Disease caused by a deficiency
Vitamin A	65 to 275 IU/ 100 ml More than 20 µg /dL  (30 to 80 µg /dL)	30 to 60  µg /dL	Vision Reproduction Immune response Mucus secretion Prevents cancers	Degeneration of eye and skin
Vitamin C	0.2 to 2.0 mg /dL	0.4 to 1.5 mg/dL	Antioxidant Collagen formation Cholesterol catabolism Catecholamine synthesis	Scurvy
Vitamin D	0.7 to 3.3 I.U / ml 24 to 69 pg / ml	25(OH)D = 10 to 60 pg/mL 1,25(OH)D = 15 to 60 pg/mL	Bone calcification	Rickets Osteomalacia
Vitamin E	more than 0.5 mg/ ml 5 to 25 µg /dL	0.5 to 1.8 mg/dL	Antioxidant RBCs membrane stability Neurological function CVS disease prevention	Hemolytic anemia
Vitamin B 1 (Thiamine)	Whole blood =90 to 140 nmol/L RBCs = 280 to 590 ng/g of Hb		Antioxidant activity Energy production Help to maintain the myelin sheath Maintain healthy heart muscle Helps brain function	Beriberi
Vitamin B 6 (Pyridoxine)	5 to 25 ng/ml	EDTA plasma = 5 to 30 ng/mL	Helps neurotransmitter Synthesis of hemoglobin Promote immune function Role in hormone regulation Important for brain function	Genaral metabolic defect
Vitamin B 12	200 to 800 pg/ml	205 to 678 ng/mL	Myelin formation Synthesis of methionine DNA synthesis Folate interconvertsion	Megaloblastic anemia Pernicious anemia
Folic acid (B9)	5 to 21 µg /dL	Serum = 2.6 to 12.2 µg /L RBC = 103 to 411 µg /L	Role in DNA synthesis and repair RBC production and maturation Fetal development Control dementia and Alzheimer Regulate mode Cell growth and repair	Megaloblastic anemia
Vitamin K	0.13 to 1.19 ng/mL	0.13 to 1.19 ng/mL	The main function of coagulation	Hemorrhagic disease
Pantothenic acid (B5)	Whole blood = 344 to 583 µg /L 24 hours urine = 1 to 15 mg/day		Energy production Synthesis of important basic molecules Cellular metabolism and growth Maintain skin health Antioxidant	General metabolic defect

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