If you have certain stomach or intestinal conditions If you have atrophic gastritis, celiac disease, Crohns disease, or have had stomach or intestinal surgery, its possible youre not able to properly absorb vitamin B12 from foods and need to use dietary supplements to meet your daily intake needs
Therefore, the first place you need to look when the benefits of a methyl-B12 shot seems to wear off too soon is to retry the shots at the same dose and frequency but make the angle of attack much more severe, much closer to the horizontal plane, just under the skin
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This makes it much faster and more reliable especially for people who cannot absorb B12 properly through food or supplements