Fish, vitamin D, and flavonoids in relation to renal cell cancer among smokers.
Wilson RT, Wang J, Chinchilli V, Richie JP, Virtamo J, Moore LE, Albanes D.
Am J Epidemiol. 2009 Sep 15;170(6):717-29. Epub 2009 Aug 3.
PMID: 19651663
doi:10.1093/aje/kwp178
These results suggest that the flavonoid quercetin may prevent renal cell cancer among male smokers. The possible risk associated with fish intake warrants further investigation before conclusions may be drawn.