I think that's just conventional wisdom/wishful-thinking propagated forward (like so much dietary advice): http://www.ncbi.nlm.nih.gov/pubmed/19943985 http://ww

I think that's just conventional wisdom/wishful-thinking propagated forward (like so much dietary advice): http://www.ncbi.nlm.nih.gov/pubmed/19943985 http://www.ncbi.nlm.nih.gov/pubmed/19943985 (cited in http://www.nytimes.com/2010/03/23/health/23really.html http://www.nytimes.com/2010/03/23/health/23really.html).