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 Health News Agencies In New York And Beyond Pass The Buck On Opioid Cash Oversight How Does ADHD Affect Athletes' Concussion Risk
Frequency varies based on individual needs, from weekly to monthly
Deficiency is widespread in the UK due to limited sunlight exposure, and is particularly prevalent in those with chronic illness, darker skin tones, or conditions affecting fat absorption
Intramuscular injections typically produce early haematological responses within 34 days, whilst neurological symptoms may begin improving within 12 weeks
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