why have b12 injections The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Vitamin B12 Injection Dosage for

In addition, if your deficiency is caused by intestinal problems (such as celiac disease or Crohns disease), the effectiveness of oral supplements may be greatly reduced because the bodys ability to absorb vitamins through the intestines has been impaired

Use of this product intravenously will result in almost all of the vitamin being lost in the urine

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