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B12 deficiency can cause: If you have anaemia caused by a vitamin B12 deficiency, you may have other symptoms, such as: Some of these symptoms can also happen in people who have a vitamin B12 deficiency but have not developed anaemia

Knowing the correct injection sites not only ensures the treatment is more effective, but also helps reduce discomfort and potential side effects

The COA should specify that lot number, and the vial you receive should have the same number

Serum B12, and potentially methylmalonic acid (MMA) and homocysteine, give your clinician the data to determine whether B12 is a contributing factor or whether the mood symptoms are being driven by something else entirely

Avoid vigorous agitation

Individual traits and consumption methods also matter