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Before taking, speak with your doctor if you are allergic to vitamin b12, have a genetic condition called optic atrophy, have blood in your urine, polycythemia, an ongoing infection, low iron or folate levels, are pregnant or plan to become pregnant, are breastfeeding or plan to breastfeed
How Often Should I Take A B12 Injection
However, doctors may recommend taking B12 supplements after the age of 50 years as your ability to absorb B12 decreases with age
Dizziness: Rare, but reported occasionally, especially if injecting without eating for extended periods afterward
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