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Debourdeau, P
The B12 Boost is a master at boosting your immune system and increasing your energy and focus, helping you kick perpetual grogginess to the curb
That is about 10,000 pernicious anemia injections all at once, and you still cant overdose
We explain why it's important to ensure you're getting enough, possible symptoms of deficiency, and how to top up levels if needed
Primary Handling Editor: Sonia Muliyil, in collaboration with the Nature Medicine team
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