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Normal value ranges for vitamin B12 vary slightly among different laboratories and can range anywhere between 200 to 900 pg/mL. The general consensus is values less than 200 pg/mL constitute a B12 deficiency.ormal value ranges for vitamin B12 vary slightly among different laboratories and can range anywhere between 200 to 900 pg/mL. The general consensus is values less than 200 pg/mL constitute a B12 deficiency.
Vitamin B12, also known as cyanocobalamin or cobalamin, is an essential nutrient involved in many metabolic pathways. The recommended daily intake of Vitamin B12 is 2.4 micrograms per day for adults over the age of 19.itamin B12, also known as cyanocobalamin or cobalamin, is an essential nutrient involved in many metabolic pathways. The recommended daily intake of Vitamin B12 is 2.4 micrograms per day for adults over the age of 19.