jane2007 submitted, created time 11 months 2 weeks (www.nature.com)

In 1981, Nature published a review about the possible link between high levels of dietary β-carotene and reduced rates of cancer.
In 1994, the results of those trials were in: β-carotene supplements, given together with vitamin E, did not protect against lung cancer as epidemiological studies had suggested they might. Instead, the supplements may actually have raised risk of developing the disease for male smokers.

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