...When I set out to interview public health authorities and researchers for this article, they would often initiate the interview with some variation of the comment “surely you’ve spoken to Robert Lustig,” not because Lustig has done any of the key research on sugar himself, which he hasn’t, but because he’s willing to insist publicly and unambiguously, when most researchers are not, that sugar is a toxic substance that people abuse... ...What we have to keep in mind, says Walter Glinsmann, the F.D.A. administrator who was the primary author on the 1986 report and who now is an adviser to...