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Adaptation Window Your body needs a certain timeframe to acclimatize and harness the increased B12 vitamin levels introduced

You should also contact your GP if: You are unable to attend scheduled maintenance injections, as missing doses can lead to symptom recurrence You develop new symptoms that might indicate other deficiencies or health problems You are planning pregnancy, as B12 requirements may change You experience persistent side effects such as headaches, dizziness, or gastrointestinal symptoms If you experience any side effects, talk to your doctor, pharmacist or nurse

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Chinese clinical guidelines recommend a standard 3-week tDCS treatment course, adjustable based on individual patient needs (Programme CEGO et al., 2025)