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Report illegal sales or websites selling unlicensed medicines via the MHRA's dedicated enforcement reporting portal (gov.uk/report-problem-medicine-medical-device)

The NHS does not set an upper safe limit for B12 because harmful effects from excessive intake have not been definitively established

Red blood cells carry oxygen to the bodys tissues and remove carbon dioxide

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For example, people who maintain a vegetarian or vegan diet, people with absorption disorders, and those taking prescription meds like Metformin, Proton Pump Inhibitors (PPIs), and H2 blockers like Pepcid are often at greater risk