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But if you caught your deficiency early and its milder, you might feel subtle improvements in as little as 5-7 days after starting shots
Understanding B12 Deficiency: Signs You Might Need a Boost Vitamin B12 is crucial for nerve function, red blood cell production, and DNA synthesis
B12 shots are injections that contain high doses of this vitamin
They're tools designed for different questions
Cyanocobalamin clears faster and requires more frequent dosing, so it has largely fallen out of routine use here
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