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Studies suggest this approach can achieve tissue concentrations approaching injectable levels
People with documented malabsorption disorders including Crohns disease, celiac disease, or those whove had portions of stomach or small intestine removed need direct delivery
For that reason, an untreated pernicious anemia often leads to neurological damage, which should explain why so many patients with neurological disorders such as Alzheimer, multiple sclerosis, peripheral neuropathy, and Bells Palsy, benefit from B12 shots
Other Vitamin B12 forms, like adenosylcobalamin, are used in certain situations