Communicating with the dietetics profession

In Mother Jones this week, Kiera Butler has a striking report about the food industry presence at a conference of the California Dietetic Association. The description of attendees consuming and discussing their free McDonald's salads makes the association seem careless with its valuable public image and credibility.

One might ask, how on earth could dietitians ally themselves with major fast food chains, instead of with advocacy groups -- or hard-hitting magazines -- that seek to better represent the public interest?

Part of the answer, surely, is that the food industry provides funding to the dietetics associations. This is the answer Mother Jones might emphasize.

Another part of the answer is that the food industry publicly endorses the best judgment of dietitians and nutrition scientists on the leading diet and health questions of the day. Actual products may not follow this judgment, but the industry's public communications are deeply respectful of the profession. Industry representatives endlessly tell the profession, "We listen to your advice, while those would-be do-gooders in the public interest community foolishly pursue one nutrition fad after another."

For example, consider the claim in the Mother Jones article that mounting scientific evidence shows that "high-fructose corn syrup prompts more weight gain than other sugars." The article links to this four year old 2010 press release from Princeton University, which imprecisely summarizes its supporting scientific journal article (.pdf), which in turn has been strongly criticized by NYU's Marion Nestle, who is quoted as a trusted authority in the same Mother Jones article (!), and who further links to a more detailed evisceration of this research.

It is fine to criticize high-fructose corn syrup (HFCS) along with sugar, because of strong evidence that both are associated with risk of weight gain. But the current evidence does not support Mother Jones' claim that HFCS prompts more weight gain than other sugars. That claim -- and more specifically the casual and uncritical link to the Princeton University press release -- plays into the industry's strategy for befriending dietitians.

Writers and advocates who care about the public interest really can persuade the dietetics profession to adopt a more independent and skeptical stance in its relationships with the food industry. We could begin by avoiding these failures in summarizing the best scientific evidence.