food frequency questionnaire

The expression, "there are three types of lies: lies, damn lies, and statistics," is attributed to Benjamin Disraeli, the U.K.’s Prime Minster from 1874 to 1880. A century and a half later, improper manipulation of statistics is pervasive.

One day, coffee causes cancer; the next, it cures cancer. One day, wine is good for you; the next it kills you. Given its self-contradictory wishy-washiness, can nutrition science be trusted?