Repeated punctures with a contaminated needle introduce microbes that proliferate during storage, even at refrigerator temperature
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Last updated on Mar 24, 2026
extreme tiredness (fatigue) shortness of breath chest pain or tightness problems with memory and concentration (brain fog) difficulty sleeping (insomnia) heart palpitations dizziness pins and needles joint pain depression and anxiety tinnitus, earaches feeling sick, diarrhoea, stomach aches, loss of appetite a high temperature, cough, headaches, sore throat, changes to sense of smell or taste rashes Ah
Research-based protocols typically use 250-500 mcg daily, often divided into two doses
Standard B12 injection dosing protocols align with this format, especially in clinical repletion schedules