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Vitamin B12 is crucial in the formation of red blood cells and the functioning of the nerve
Dietary Factors: Vitamin B12 is mainly found in animal products such as meat, fish, eggs, and dairy
Methylated B12 is studied for its role in methylation-dependent biological processes, including biochemical pathways related to homocysteine metabolism, nervous-system function, red blood cell biology, and cellular energy regulation
That should give you a better understanding of what causes B12 side effects
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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
