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Description
And their knowledge and professionalism is top notch

PLoS ONE 9 , e113939 (2014)

You can speak to your GP about B12 injections.
Yet, they're still tired, still brain-foggy, and coming in wondering, "Is it something else?" But when we do labs and put them on injections, they can notice the change almost immediately

In some cases, a bone marrow biopsy may be necessary

Nutrition, Metabolism and Cardiovascular Diseases