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Two common forms of B12 injections are cyanocobalamin and hydroxycobalamin, which are both synthetic forms, while methylcobalamin is the naturally occurring, active form the body uses most readily
making it an ideal choice for athletes and fitness enthusiasts
Vitamin B12 helps boost energy levels and helps assist with weight loss
In rare cases, a long-standing B12 deficiency can affect the optic nerve, potentially causing blurred or double vision
Commonly Reported Effects Injection site reactions represent the most frequent complaint, typically involving mild redness, itching, or temporary discomfort at the injection location
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