Fig. 6From: Holotranscobalamin (HoloTC, Active-B12) and Herbert’s model for the development of vitamin B12 deficiency: a review and alternative hypothesisInstantaneous failure of enterohepatic recycling. Total B12, serum total vitamin B12 concentration; HoloTC, serum holotranscobalamin concentration; MMA, plasma methylmalonic acid concentration; tHcy, plasma total homocysteine concentrationBack to article page