Vitamin - Lab. eval
Vit A: Sr. retinol
Vit D: Sr. 25-hydroxyvitamin D
Vit E: Sr. tocopherol: total lipd TG and chol ratio
Vit B1, thiamine: RBC transketolase activity
Vit B2, riboflavin: RBC glutathione reductase activity
Vit B3, niacin: Urinary N-methyl-nicotinamide
Vit B5, pantothenic acid: Urinary pantothenic acid
Vit B6, pyridoxine: Plasma pyridoxal phosphate
Vit B7, biotin: Plasma biotin
Vit B9, folic acid: Sr. folic acid, RBC folic acid
Vit B12, cobalamin: Sr. cobalamin, Sr. methylmalonic acid
Vit C, ascorbic acid: Plasma ascorbic acid, leukocyte ascorbic acid
Vitamin B12 deficiency correction regimen: Vit B12 1000 mcg IM daily for a week, then weekly for a month, then monthly for a year.