Vit.B12: The only reason to take vit. B12 is that you are deficient. Taking this vit. When not deficient will not help you and will not help tiredness. Many causes for tiredness.
Answered 12/9/2019
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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