A member asked:

Can you have a b12 deficiency and have 'normal' serum b12 levels?

A doctor has provided 1 answer

Dr. Derrick Lonsdale answered

Yes: Vitamin B 12 is used inside the cell and is the reason why measuring vitamins in the blood does not give you an answer that is practical.

Answered 2/1/2019

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A member asked:

Can you have a b12 deficiency and have 'normal' serum b12 levels?

A doctor has provided 1 answer

Dr. Derrick Lonsdale answered

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Questions?

Can all over tingling be a symptom of iron deficiency anemia? I'm only findinf it on B12 anemia symptoms lists, my b levels are normal or high