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If you have a severe medical condition or health concern, see your physician
Individuals who suffer from pernicious anemia do not produce the necessary intrinsic factor for B12 absorption
People with Digestive Issues: Conditions like Crohns disease, celiac disease, or irritable bowel syndrome can interfere with B12 absorption, making injections a more effective method of getting the nutrient
Do not self-inject it
Neuropeptide Y and pancreatic polypeptide receptors
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