Before turning attention directly to the Dietary Guidelines, let’s conduct a thought experiment. Imagine that a major auto manufacturer, pick anyone you like, has its best engineers draw up detailed blueprints for the new lineup of cars. Imagine these blueprints begin with the prior lineup of cars, but then use the best, current engineering and technology to improve on them.
Now, imagine those blueprints are turned over to the marketing department, or maybe even an outside advertising agency, and staff at the ad agency actually build the cars- with no involvement at all by the engineers. Imagine, further, that the marketing and advertising folks are at liberty to keep what they want, discard what they want, and alter the blueprints as inclined to best address the imperatives of marketing, and presumably, profit.
And, in fact, let’s go just one step further. Let’s imagine that the team of expert engineers that drew up the blueprints in the first place, after months or years of exacting and meticulous effort, was disbanded and laid off the moment they passed the blueprints along.
Here’s the question for you: would you drive such a car? Would you load your family into one?
If not, you may want to think twice before buckling into the Dietary Guidelines.
Far-fetched, and even outrageous as my car-manufacturing scenario may seem, this is exactly how the Dietary Guidelines for Americans are now manufactured. A multidisciplinary group of highly regarded nutrition experts are exactly analogous to the engineers. They use the best, current evidence to update the prior guidance. Their report- the Dietary Guidelines Advisory Committee Report- is analogous to those engineering blueprints. Neither is likely to be perfect, but both are the honest, best representation of best, current, expert thinking.
Like my hypothetical engineers, the DGAC does, indeed, turn over its report- in this case, to the USDA. Admittedly, the USDA is not a marketing department or advertising firm. But USDA, and its counterpart in this endeavor, the Department of Health and Human Services, are accountable to Congress, which in turn is apt to represent the interests of very well-heeled lobbyists. By proxy, then, the interests of marketing, and corporate profits, are very well represented.
The federal agencies take the “blueprints” in question, and again as in my hypothetical scenario, the “engineers” responsible for them are disbanded, and laid off. The DGAC is undone before the official Dietary Guidelines are produced.
What we wind up with is a rather dubious “vehicle” for carrying Americans toward better diets, and better health. We wind up with a vehicle quite different from what the engineers had in mind, and quite possibly one they would deem unsafe.
I have already opined plenty on the differences between the 2015 DGAC report, and the 2015 Dietary Guidelines for Americans that followed; I won’t revisit those particulars here. Instead, I want to suggest what I consider plausible, remedial steps.
We can certainly accept that the marketing department might offer those automotive engineers some pushback. Maybe their engineering ambitions are too bold; maybe the costs would be too high. I think we would all be OK with some compromise, and I suspect we are all driving cars derived of just such exchanges. We just want to know that the engineers are involved, and looking over the shoulders of their colleagues in marketing. Further, we want the engineers overseeing construction of the final product- and signing off on safety.
The Dietary Guidelines once worked that way; the members of the DGAC participated directly in the drafting of the official Guidelines. That function should be restored. It’s not a perfect remedy. Maybe the marketing department still has veto power over the engineers. Still, we would feel safer driving cars that had engineers involved directly- and I would feel much more comfortable with dietary guidelines similarly overseen.
The second, and greater element in my proposed two-part remedy is a name change. I note that some colleagues I greatly respect disagree with me about the importance of this. But frankly, I think names sometimes matter, even if not for roses.
I’m pretty sure that the name “Dietary Guidelines for Americans” makes most of us think: these are guidelines for healthful eating for Americans. Since they don’t specify exceptions, they presumably pertain to all of us- or minimally, most of us. The name implies: this is what experts think would be best for most Americans to eat for good health.
But as noted above, and elsewhere, that’s not what the Dietary Guidelines are. They are what political powers think should be done with what actual experts think.
They are, as well, and importantly, the basis for all federal food assistance programs, from WIC, to SNAP, to the national school lunch program. This means, for one thing, that the government is very unlikely to turn the entire process over to an independent authority, such as the National Academy of Medicine. It also means that the Dietary Guidelines are used- in national food policy.
My suggestion, then, is to differentiate clearly between the work of actual nutrition experts, and the translation of that work into a guide for national food programming. The former is the best thinking of some of our best scientists based on the best evidence about the best dietary practices for Americans, in general. The latter is what the feds think the nation should DO with the best thinking from the best experts. Accordingly, I think the first could be called: The Advisory Committee Report on Best Dietary Practices for Americans. The second could be called: Diet Policy and Practice Guidelines for America. I would actually prefer Guidelines for Balancing Public Health and Corporate Profit, but doubt that one is really viable, by virtue of being too honest. Other names could work as well, provided the distinction is clear.
One way or another, we need more daylight between the two products so the politicization of expert thinking is not routinely mistaken for what experts think. The result of that conflation of baby and bathwater is the same distrust of both politicians and experts, and the loss of any opportunity to use what we know about diet to advance the health of people and planet alike.
We have every reason to expect, and right to demand, that dietary guidelines for health be born of the best available science, be produced by the best experts, and be relevant for all the people. Failing that, we have cause to invoke another great American principle, if not necessarily an entirely consistent practice: truth in advertising.
In the meantime, we the people are well advised to recall those two famous Latin words to the wise, be they about our cars, or the contents of our shopping carts: caveat emptor.
David L. Katz, MD, MPH, FACPM, FACP, FACLM, is the Founding Director (1998) of Yale University’s Yale-Griffin Prevention Research Center, and current President of the American College of Lifestyle Medicine. He has published roughly 200 scientific articles and textbook chapters, and 15 books to date, including multiple editions of leading textbooks in both preventive medicine, and nutrition. He has made important contributions in the areas of lifestyle interventions for health promotion; nutrient profiling; behavior modification; holistic care; and evidence-based medicine. David earned his BA degree from Dartmouth College (1984); his MD from the Albert Einstein College of Medicine (1988); and his MPH from the Yale University School of Public Health (1993). He completed sequential residency training in Internal Medicine, and Preventive Medicine/Public Health. He is a two-time diplomate of the American Board of Internal Medicine, and a board-certified specialist in Preventive Medicine/Public Health. He has received two Honorary Doctorates.