expired b12 injection side effects Hi I bought the injectable liquid but there's no use by date on it or how long you have to use it once it's opened. Anyone know the answer? TIA x Hydroxocobalamin (Vitamin B12): Uses, Alternatives,

When investigating elevated B12, additional tests such as active B12 (holotranscobalamin), methylmalonic acid, and homocysteine may help clarify true B12 status

The injections help restore vitamin B12 levels quickly in those with deficiency, allowing the body to properly utilize fats and carbohydrates for energy, produce new proteins, and maintain healthy blood cells and nerve function

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