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THF plays an important role in DNA synthesis, so reduced availability of THF results in ineffective production of cells with rapid turnover, in particular red blood cells, and also intestinal wall cells which are responsible for absorption

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This can deter patients from sticking with the B12 treatment plan, but it is important to stay consistent

Post-exercise timing Avoid injecting into a thigh muscle that has just been exercised

People Experiencing Unexplained Fatigue or Brain Fog Even without a formal diagnosis of deficiency, many people feel chronically tired, foggy, or unmotivatedsymptoms that can stem from suboptimal B12 levels