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High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet

Your provider will then set the cannula to allow the fluid to flow slowly from the IV drip bag into your vein

People with documented malabsorption disorders including Crohns disease, celiac disease, or those whove had portions of stomach or small intestine removed need direct delivery

Testing: Third-party analytical verification

La Belle Vie Clinic in Seattle follows a test-first, evidence-based protocol for vitamin B12 treatment aligned with NIH and AAFP clinical guidance