Variation of Serum Vitamin B12 Level in the Blood from Patients of Different Age Among the Latvian Population

The reference intervals and median values of serum vitamin B12 level in blood from patients among the Latvian population were established for different age groups with a two-year step using data for a large number of patients, accumulated in E. Gulbis Laboratory in Latvia. The data represents the general population of Latvia. An indirect in silico method, developed in E. Gulbis laboratory for determination of serum vitamin B12 blood level reference intervals, was used. Strong elevation of serum vitamin B12 blood level was observed in children who were between 2 and 10 years old. The paper discusses the serum vitamin B12 values for children and a different serum vitamin B12 reference interval for young children is suggested.