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However, neither compound is MHRA-approved for medical or therapeutic use in the UK

So far, internationally we have no test that can replace the Schillings Test II, examining the uptake of B12 when it is supplied together with intrinsic factor

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Common signs of vitamin B12 deficiency are: Fatigue Impaired brain function Feeling weak or faint A prickly feeling or numbness in your extremities Headache Mood changes Anxiety and Depression Heart palpitations Constipation Lower visual acuity How to Boost Your Immune System with Vitamin B12 Eating a balanced diet is the best way to keep up your vitamin B12 levels