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  2. www.peoplespharmacy.com › articles › how-dangerousHow Dangerous Are High Vitamin B12 Levels? | The People's ...

    Some people with high vitamin B12 levels are at greater risk for liver or pancreatic cancer (Cancer Epidemiology, Biomarkers & Prevention, April 2019). In any case, the physician must do a complete diagnostic workup to track down the reason for elevated vitamin B12 levels.

  3. www.singlecare.com › conditions › too-much-B12-symptomsToo much B12 symptoms: What are the early signs of too much B12?

    Jan 10, 2024 · Complications of too much B12. There are no complications associated with untreated high levels of B12 in the body. However, one study found that persistently high levels of vitamin B12 in older adults increased the risk of death from all causes independent of other risk factors.

  4. www.mayoclinic.org › drugs-supplements-vitamin-b12Vitamin B-12 - Mayo Clinic

    Aug 10, 2023 · Safety and side effects. When taken at appropriate doses, vitamin B-12 supplements are generally considered safe. While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine.

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  6. www.healthline.com › nutrition › too-much-vitamin-b12How Much Vitamin B12 Is Too Much? - Healthline

    Feb 24, 2023 · Vitamin B12 deficiency can lead to serious complications such as nerve damage, anemia, and fatigue, which is why those at risk should talk with their doctor about adding a high quality B12...

    • Jillian Kubala, MS, RD

  7. perniciousanemia.org › b12 › levelsWhat Do High B12 Levels Mean? - PA Relief

    If your test shows excessive B12 levels – in the absence of supplementation – this may be a sign of liver disease or cell death (and the breakdown of tissues) that release the B12 back into your blood circulation. Therefore, hypercobalaminemia (or, high serum B12 levels) may be a warning sign of some serious underlying pathology:

  8. www.verywellhealth.com › too-much-b12-8406087Can You Have Too Much B12? - Verywell Health

    Dec 1, 2023 · How Much Is Too Much? Side Effects. High Levels. Low Levels. Pregnancy and Vitamin B12. Vitamin B12 is an essential vitamin used in the body to ensure the optimal health of blood and nerve cells. It also helps to create DNA genetic material and prevents a condition known as megaloblastic anemia.

  9. www.nytimes.com › 2020/02/11 › wellExcess Vitamin B12 May Be Deadly - The New York Times

    Feb 11, 2020 · The study controlled for many factors that might affect mortality, including age, sex, body mass index, tobacco and alcohol use, diabetes, cancer and cardiovascular disease, as well as markers of...

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