2021 Jan;43(1):124-139.e8
If you suspect that you're deficient in B12 Warren recommends that you talk to your doctor, who can order a blood test to help determine if that's the case
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We'll make sure you understand that this is investigational territory
How Quickly Do B12 Shots Work
Vitamin B12 and the Brain The vitamin also plays an central part in the development of the brain