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Individuals with certain medical conditions or health concerns, such as kidney disease, liver disease, certain blood disorders, or allergies to specific vitamins, may need to avoid or modify the therapy

doi: 10.1126/science.6823561

Because these symptoms overlap with so many other things, they're easy to miss, which is part of why the post recommends regular medical check-ups to catch deficiencies early

For example, a 25-year-old female patient experienced a severe anaphylactic reaction after receiving a cyanocobalamin injection, highlighting the need for vigilant monitoring during administration

Guarnera et al., 2010[47]
