Researchers are questioning links between vitamin B12 and cancer. Deficiency increases cancer risk while prolonged high-dose supplementation may relate to poorer outcomes.
Key Takeaways
- Scientists are investigating complex relationships between vitamin B12 status and cancer development and progression.
- Vitamin B12 deficiency has been linked to an increased risk of developing certain cancers in observational studies.
- Some research suggests prolonged high-dose B12 supplementation may be associated with poorer outcomes among people with cancer.