In general, an earlier age of onset of bone disease is associated with a poorer prognosis [41]
And if you're struggling with persistent headaches, too much vitamin B12 from injections might be a contributing factor
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IV zinc may be considered when oral intake is not tolerated, absorption is impaired, or short-term repletion is clinically indicated.
Understanding their origins helps clarify why they affect the body differently
Summary: Vitamin B12 supplements can occasionally cause mild stomach side effects including nausea, diarrhoea, abdominal cramping, and indigestion, though these are generally uncommon and temporary