if you develop symptoms like hives, difficulty breathing, chest tightness, or severe dizziness after an injection, seek medical attention, as those could indicate an allergic reaction (which is extremely uncommon)
Clinical Indications for B12 Intravenous Treatment B12 IV treatment is for severe deficiencies, when oral supplements dont work
So people at greatest risk for deficiency include those with low stomach acid (e.g., older adults and people on proton pump inhibitors or antacids) or low IF production (known as pernicious anemia), people on medications that interfere with B12 absorption (such as metformin), people who have had gastric surgery, those with GI conditions that impair nutrient absorption (like celiac or Crohn's disease), and people on vegan and vegetarian diets
In wellness spaces, however, the same word is often used for experimental compounds that may look promising in animal studies or very early human trials but havent been rigorously studied
In cases of severe deficiency or pernicious anemia, injections may be given daily or weekly initially, followed by maintenance doses every month
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