Dietary guidelines

US Congress: We need to review the Dietary Guidelines for Americans

Concerned about the integrity of America’s nutrition advice, the US Congress has called for a comprehensive review of the way the influential Dietary Guidelines for Americans is compiled. The latest iteration of the guidelines are due to be published finally in January 2016.

The measure, which passed the House and Senate as part of the massive budget bill, sets aside $1-million for the National Academy of Medicine to conduct the study.

“Questions have been raised about the scientific integrity of the process in developing the dietary guidelines and whether balanced nutritional information is reaching the public,” according to language accompanying the bill. “The entire process used to formulate and establish the guidelines needs to be reviewed before future guidelines are issued.”

“I hope this will make sure that the Dietary Guidelines are science-based,” said Rep Collin C Peterson (D-Minn), ranking member of the House Agriculture Committee, one of the committees overseeing the Dietary Guidelines.

“They keep changing so much I’m not sure how many of the American people pay attention to it anymore.”

The Dietary Guidelines for Americans, updated every five years by the federal government, has far reaching effects on what Americans eat, shaping the contents of school meals and military rations and serving as the scientific basis for reams of diet claims published in newspapers, magazines, and advice books.

Science in turmoil

Nutrition science has been in turmoil in recent years, however, and this year, the scientific disagreements over the positions the Dietary Guidelines have taken on  salt, whole milk and saturated fat, cholesterol, as well as the health implications of skipping breakfast

Articles have also explored the recommendations made by the Dietary Guidelines Advisory Committee, the expert group providing information to the government, regarding coffee and the environmental impacts of meat production.

The bill calls for the Department of Agriculture, within 30 days, to hire the National Academy of Medicine to conduct a comprehensive study that includes an analysis of how the Dietary Guidelines can better prevent chronic disease, how evidence is assembled and evaluated, and whether a full range of scientific viewpoints are considered……

The Dietary Guidelines are largely the work of the federal bureaucracy and the Dietary Guidelines Advisory Committee, a 15-member panel of experts. Updating the guidelines every five years is a daunting task that falls to a relatively small group of people. Nutrition science evolves rapidly, and over the course of a year of meetings, the advisory committee is called upon to review hundreds of dense – and sometimes conflicting – scientific papers.

Extracting sound diet recommendations from all the research information is both arduous and, arguably, confusing. Along the way, the Dietary Guidelines have grown more intricate, expanding from a pamphlet into a 112-page book.

While the guidelines have evolved as scientific understanding grows, critics charge that it has moved far too slowly, most notably with regard to saturated fats, which are the fats characteristic of meats and dairy products. They also note that during the existence of the Dietary Guidelines, rates of obesity have risen.

“This is important because it’s the first time Congress has noted there is a problem with the Dietary Guidelines process,” said David McCarron, research associate at the Department of Nutrition at the University of California-Davis. He is the incoming chair of the medical nutrition council at the American Society of Nutrition and sits on a scientific advisory board at ConAgra Foods.

There’s a lot of stuff in the guidelines that was right forty years ago but that science has disproved. Unfortunately, sometimes, the scientific community doesn’t like to backtrack.”…..

Washington Post: Read the full article


Related reading:

How dietary guidelines are out of step with science: BMJ

It has a big impact on the diet of American citizens, and those of most Western nations, so why does the expert advice underpinning US government dietary guidelines not take account of all the relevant scientific evidence? By Nina Teicholz…..

Source: BMJ 2015;351:h4962

Why the new, proposed U.S. dietary guidelines are provoking controversy and ire: Fortune

To get an idea of just how controversial the guidelines have become, consider that five years ago, the last time they were reviewed, they received about 2 000 public comments. This year, they have received 29 000…..