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Some people prefer adding less water to make full-vial injections more convenient
But even without that level of customization, understanding the core dosing principles will put you ahead of most researchers fumbling through contradictory information online
If you have high homocysteine levels you are likely low in methylcobalamin
Before taking a B12 shot, tell your doctor if you: Are allergic to B12, cobalt or any multivitamin combinations Have vision issues or Lebers disease (a genetic condition that causes vision loss) Have any infections Have been diagnosed with folic acid deficiency or iron deficiency Are pregnant, breastfeeding, or planning to get pregnant Are taking any supplements, including herbal supplements Are taking any medications, such as folic acid, methotrexate, chloramphenicol, colchicine, para-aminosalicylic acid (PAS), or pyrimethamine Have liver or kidney disease Have a drinking problem RxList
Subcutaneous Options: Abdomen and Thigh While most B12 shots are injected into a muscle (intramuscular), they can also be given as a subcutaneous injection
Doctors watch how patients are doing and if their vitamin B12 levels are getting back to normal
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