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Public Health: ‘Natural‘ Cancer Prevention Trial Halted

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Science  26 Jan 1996:
Vol. 271, Issue 5248, pp. 441
DOI: 10.1126/science.271.5248.441b

Summary

Hopes that beta carotene might prevent cancer were dashed last week when two large trials showed that the dietary supplement is at best ineffective. One large trial even suggested that it may raise cancer rates in some groups. Researchers are now struggling to explain the findings.