... acid; selenium; or calcium) were scant and heterogeneous and showed no clear evidence of benefit or harm. Neither vitamin E nor I2-carotene prevented CVD or cancer, and I2-carotene increased lung cancer risk in smokers. The analysis included only ...
http://annals.org/article.aspx?articleID=1767855
http://annals.org/article.aspx?articleID=1767855
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