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Its smart to keep an eye on B12 levels to adjust treatment as needed

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

Mood changes such as irritability, depression, or anxiety, as well as numbness or tingling in the hands and feet, can also be linked to low B12 levels

Severe, long-standing damage may take longer or may be permanent, which is why early treatment matters

Discuss options with a clinician to match safety, evidence, and personal medical history

What are B12 injections, and how do they work