The people who are at the highest risk of B12 insufficiency or deficiency are older adults, those with atrophic gastritis, gastrointestinal disorders, pernicious anemia, those who have had gastrointestinal surgery, vegans, and vegetarians
They combine the simplicity of a tablet with the effectiveness of more direct absorption
Patients with gastrointestinal disorders such as Crohns disease, celiac disease, or those who have undergone gastrointestinal surgeries (including gastric bypass) often experience impaired B12 absorption
The best forms of B12 for injection are methylcobalamin or hydroxocobalamin
Additional Technical and Protocol Sources GenScript
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