b12 injections sq or im How to Give a Injection: Step-By-Step Instructions How SubQ Injections Like B12

But you can also use B12 shots for cold and flu symptom relief

If you have a vitamin B12 deficiency, you might feel symptoms like fatigue, weakness, or tingling in your hands and feet

Contact your GP if: You have been found to have elevated B12 levels and have not received an explanation or follow-up plan You are taking high-dose B12 supplements without medical supervision You develop new symptoms whilst taking B12 supplements, particularly skin changes, persistent headaches, or gastrointestinal symptoms You have risk factors for liver disease (alcohol excess, viral hepatitis, obesity) and have elevated B12 You experience unexplained weight loss, night sweats, or persistent fatigue alongside elevated B12 Seek urgent medical attention if you experience: Jaundice (yellowing of skin or eyes) Severe abdominal pain or swelling Unexplained bruising or bleeding Confusion or altered consciousness Severe, persistent vomiting These symptoms may indicate serious underlying conditions such as acute liver failure, haematological emergencies, or other critical illness requiring immediate assessment

The benefits build gradually as your body restores healthy B12 levels

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