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A simple blood test will reveal the severity of your deficiency and help a doctor determine whether diet, supplements, or injections are your best solution
However, in very rare cases, some people can experience side effects caused by allergic reactions or sensitivity ( 29 , 30 )
Each Vitamin B has distinct functions: Vitamin B1 is crucial for energy metabolism, Vitamin B3 assists in DNA repair, and Vitamin B9 is vital for cell growth
Dispose of the needle properly
Left untreated, a B12 deficiency can also lead to long-term health issues
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