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Severe neurological deficiency may require daily injections initially, tapering to monthly maintenance

However, reduced dietary intake due to appetite suppression and gastrointestinal side effects may indirectly increase deficiency risk, particularly if consumption of B12-rich animal products decreases significantly

Contraindications: Some peptides may have contraindications for certain medical conditions

R., & Annamaraju, P

Common reasons include: Pernicious anemia , an autoimmune condition affecting intrinsic factor production Gastrointestinal disorders, such as Crohns disease or celiac disease Prolonged use of certain medications, like proton pump inhibitors Knowing these causes helps spot at-risk people