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Always follow the laws and institutional rules that apply to handling research compounds.
People with the following should discuss risks carefully with a medical professional: Liver disease Kidney disease Pernicious anemia Known allergies to any ingredient in the formulation Pregnancy or breastfeeding (safety not well-studied avoid unless prescribed) Because ingredients differ between providers, always verify the formulation and follow prescribed dosing to minimize risk
Some people might prefer one over the other
Pregnant or Breastfeeding Women: Expectant mothers may need additional B12 to support their own health and the development of their baby
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Other more sensitive tests are now available, which test for serum methylmalonic acid and serum homocysteine levels
