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Supports red blood cell production and may increase energy and alertness
The gauge of the needle refers to its thickness
Vitamin B12 can help to prevent many conditions including anemia, which is a blood condition that can make you feel tired and weak
What not to do after a B12 injection: the short list Here are the most important immediate things to avoid
If you develop severe allergic reactions such as difficulty breathing, facial swelling, or widespread rash after a B12 injection, call 999 or go to A&E immediately, as these may indicate anaphylaxis, though this is extremely rare
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