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Vitamin B12 is a vital nutrient that plays a key role in the production of red blood cells, maintaining healthy nerve function, and supporting DNA synthesis

Knowing How Quickly B12 Shots Work Remember, developing a B12 deficiency can take years

Energy and Endurance Low B12 levels can leave you feeling drained

Stomach acidity runs lower after eating, which helps the strains survive transit and reach the gut alive

The Emergency Method: Reconstituted with sterile water and stored in a refrigerator (2-8C), the viability drops dramatically

Researchers also looked at natural killer cell function and oxidative stress markers