If you are considering B12 for energy, tiredness or a diagnosed deficiency, our B12 injections page has the detail, and you can book a free consultation to talk it through first
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Vegetarians and vegans, you probably need supplemental B12
Knowing what happens before and after reduces worry
External Link : According to Harvard Health, Vitamin B12 is essential for nerve health and energy production
Other symptoms may include: Glossitis (sore, red tongue) Mouth ulcers Visual disturbances (rare, due to optic neuropathy, requiring urgent assessment) Gastrointestinal symptoms such as diarrhoea or constipation It is crucial to recognise that neurological damage from B12 deficiency can become irreversible if left untreated for prolonged periods