The 5.78703704 × 10-5 hertz Fallacy
This well-conducted study collected data from a large population across 10 different countries and specifically assessed the effect of fruit and vegetable intake on overall risk of cancer. The authors say that the relationship between diet and incidence of total cancers is less frequently studied than that between diet and individual cancers, and that results in this area have been inconsistent. This particular study found only a borderline reduction in risk of cancer with increased consumption of fruit, vegetables and total fruit and vegetables.
A commendable article from the NHS on the survey, you can almost hear their teeth gnashing as they admit that the five-a-day bossy campaign is almost a waste of time, and they point out there may be other benefits and problems with the survey. But the big point is that this was claimed to be a certainty, and it ain't
Google Search - five a day
= 5.78703704 × 10-5 hertz is the top result - geeks rule!