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The recommended dosage for B12 injections in adults is generally 100 mcg (0.1 mL) daily for 6 or 7 days, followed by a maintenance dose of 1,000 mcg once a month
And you have had both
So, if for example you experience worse fatigue after B12 injections, it might be a brief phase where your body is still using the unhealthy red blood cells
B12 is an essential vitamin that plays a critical role in various bodily functions
We go into what science says about the effectiveness of a B12 shot
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