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Lack of vitamin B12 can cause a number of health problems, including muscular weakness, numbness, stiffness in the legs, and memory loss

Each has distinct pros and cons

You may benefit from a B12 injection if you are experiencing: Persistent tiredness or fatigue Low mood or irritability Difficulty concentrating Muscle weakness Pins and needles Pale skin Reduced appetite If you are unsure whether you need B12 supplements or injections, our pharmacist can provide guidance based on your symptoms and health history

A blood test will confirm a deficiency, with typical thresholds being total B12 levels under 180 nanograms per litre or active B12 below 25 pmol/l