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Guideline 5: Safety Considerations and Managing Side Effects Its important to give Vitamin B12 injections safely to get the best results and avoid risks
In borderline cases, methylmalonic acid or homocysteine levels may be tested
B12 overdose symptoms include skin rashes, itching, upset stomach (nausea, vomiting, diarrhea), b12 overdose headache, and feeling anxious or nervous
Peripheral vascular thrombosis: Increased risk of clotting in individuals with elevated levels
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