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Final Thoughts and Next Steps Now, are B12 shots safe
We suggest regular checks of: Serum B12 levels Methylmalonic acid (MMA) levels Complete Blood Count (CBC) These tests help doctors see if B12 is working right and adjust treatment as needed
Some people even notice blurred vision or changes to their eyesight
The best B12 absorption occurs at least two hours after eating and 30 minutes or more before you eat again
NHS guidance is clear that it should be prescribed and given by, or under the supervision of, a suitably qualified professional
You may wake up thirsty, dizzy, fatigued or lightheaded
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