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PPIs (like omeprazole and pantoprazole) drastically reduce stomach acid production
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The Food and Nutrition Board has established recommended dietary allowances and dietary reference intakes for vitamin B12
Untreated vitamin B12 deficiencies can lead to neurological issues or pernicious anemia which can occur when your body does not have enough vitamin B12 to produce the amount of red blood cells it needs
While B12 is generally safe, caution is needed in specific clinical situations: Lebers Disease (Hereditary Optic Neuropathy): B12 injections are generally contraindicated or should be used with extreme caution, as they may potentially aggravate optic atrophy in this rare condition
Recommendations for diagnosis and management of metformin-induced vitamin B12 (Cbl) deficiency
