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It is not
It is involved in producing red blood cells, which are responsible for carrying oxygen throughout the body
For more on where B12 comes from and how to increase your intake through food, you can read our short guide on the best dietary sources of B12
I would welcome feedback on this as I am unsure but want a balanced approach to the life changes I need to make
Rarely, serious allergic reactions or anaphylaxis can occur
A physician typically prescribes B12 shots for those who eat a diet that does not contain enough vitamin B12
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