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The most common forms of injectable B12 are cyanocobalamin and hydroxocobalamin , with methylcobalamin also being a popular, highly absorbable option
Michelle Andrews, founder of ChiroHer, and I've helped hundreds of patients understand their health needs, including when injectable b12 for humans might be the right solution
You should also inform your doctor right away in case you encounter any of the following serious side effects
[1] [2] Blood levels of B12 may rise quickly following injection, though elevated blood levels do not immediately translate to symptom resolution
Cognitive symptoms, including memory problems and confusion, may show gradual improvement over three to six months, particularly in older adults
Symptoms may include hives, difficulty breathing, and swelling of the face, lips, or tongue
