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If your immune system is attacking the intrinsic factor protein, you've lost the ability to absorb B12 through your gut
In humans, impaired stomach lining stems from gastric surgery, chronic inflammation or pernicious anemia a medical condition characterized by fatigue and a long list of other symptoms
not approved by the FDA, EMA or other agencies
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Anesthetized dogs were poisoned by intravenous administration of a lethal dose of potassium cyanide
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