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B12 overdose symptoms, safe dosage, and signs of excess vitamin B12 can help you make informed decisions about supplementation

This is especially important if you experience symptoms commonly associated with high vitamin B12 levels in the blood, including: 9 Gastrointestinal issues, such as nausea, vomiting, or diarrhea Headaches Tingling sensations in the hands and feet Weakness and fatigue Should I Be Concerned About High Vitamin B12 Levels

Supplementing with B12 Vitamin B12, bound to protein in food, is released by the activity of hydrochloric acid and gastric protease in the stomach

"But if you're talking about being on it forever, then yeah, it could add up to that," she added