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Those who don't produce enough intrinsic factor can become deficient

When the anemia is severe and the red blood cell count is extremely low, blood transfusions may be necessary for the first couple of days until the vitamin B 12 injections begin working

Understanding when such feelings are normal, temporary, or a reason to see a doctor provides helpful clarity

Who Is at Risk for B12 Deficiency

Starting at $99 Support steady energy, endurance, and recovery with an easy, injection-free way to boost NAD+ for lasting cellular energy

However, for most people with normal B12 levels, supplementation or injections do not significantly affect metabolism or fat loss