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Description
Intrinsic Factor and B12 Absorption: Vitamin B12 is a very large molecule compared to other vitamins and requires an enzyme called intrinsic factor to metabolize effectively

High-Concentration Homocysteine Inhibits Mitochondrial Respiration Function and Production of Reactive Oxygen Species in Neuron Cells

Caballeria L, Pera G, Auladell MA, Toran P, Munoz L, Miranda D, et al

Furthermore, although its very rare, getting too much vitamin B12 can lead to toxicity, says Yuval Pinto, MD, an obesity and family medicine doctor at Johns Hopkins Medicine in Baltimore
