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Yes, oral crystalline B12 typically 1,000 micrograms of cyanocobalamin daily is usually the first-line approach after gastric banding, as the absorptive anatomy remains intact
The rate of absorption is slow
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If you have a hormone-releasing IUS such as Mirena or Kyleena, or a contraceptive implant such as Nexplanon, Norethisterone is generally not recommended and requires clinical assessment
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