Hydroxocobalamin is considered safe for use during pregnancy and breastfeeding when clinically indicated
Although cyanocobalamin is more readily absorbed, much of it is excreted through the urine before it can reach the cells Cyanocobalamin vs Hydroxocobalamin In comparison to hydroxocobalamin, cyanocobalamin has a significantly worse absorption rate and storability, which is why today mostly hydroxocobalamin is used in B12 injections
In some cases, a doctor may refer a person to a specialist, such as: a nutritionist or dietitian a hematologist, who specializes in treating blood conditions a gastroenterologist, who specializes in treating gastrointestinal (GI) conditions The table below contains the However, a doctor can advise on an individuals specific needs
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How long this lasts depends on how well the patient responds and the severity of the deficiency
Last Updated: September 2025