Within Hours: Some may notice improved focus and mental clarity, as B12 absorbs directly into the bloodstream. Day 1-2: B12 contributes to normal energy-yielding metabolism, supporting daily energy.

When your body doesn't receive enough vitamin B12, it slows the growth of red blood cells. A cumulative loss of red blood cells can result in vitamin B12 deficiency anemia. With it, you can experience ...

If your neurologist or oncologist was worried about pernicious anemia, they would recommend oral doses of 1,000-2,000 mcg daily, or they would prescribe B12 injections.

If your neurologist or oncologist was worried about pernicious anemia, they would recommend oral doses of 1,000-2,000 mcg daily, or they would prescribe B12 injections.

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What you can do A blood test can indicate vitamin B-12 deficiency. Treatments include taking an oral supplement, receiving vitamin B-12 injections, and changing your diet.