Big Sugar's Playbook: How an Industry Manufactured Doubt

In 1954 the president of the American Tobacco Company sat down with the heads of the other big cigarette makers and agreed on a strategy that would keep their product selling for another thirty years. They would not deny that some scientists worried about smoking and cancer. They would do something cleverer. They would fund research of their own, emphasise what was not yet proven, and keep the question open in the public mind long enough that no one felt obliged to act. A memo written by one of their PR firms a decade later put the doctrine in a single sentence that has since become the most quoted line in the history of corporate spin: “Doubt is our product.” The sugar industry was watching, and it learnt the lesson well.

An industry with a great deal to lose

Sugar is not tobacco. It will not, on its own, give you cancer, and a spoonful in your tea is not a public-health emergency. But the sugar business shared with the tobacco business one crucial structural fact: a single, cheap, enormously profitable product whose reputation could be ruined by a shift in scientific opinion. When researchers in the 1950s and 1960s began to suspect that sugar, and not only fat, might be implicated in heart disease, obesity and tooth decay, the industry faced exactly the problem the cigarette makers had faced. And it reached for exactly the same toolkit.

The central institution was the Sugar Research Foundation, founded in 1943, which over the decades renamed and reorganised itself as the Sugar Association and spun off an international arm. Its purpose was never disguised in its own internal documents: to defend sugar’s place in the diet by shaping the science that the public and the government would eventually rely on. It did this not by faking data in a laboratory but by the subtler and more effective method of choosing which questions got funded, which researchers got support, and which findings got amplified. If you decide in advance what science exists, you rarely have to lie about the science that does.

Much of what we now know about this machine we know because of one person: Cristin Kearns, a dentist turned researcher who, frustrated by the silence around sugar at a diabetes conference, began digging through archives that the industry had long forgotten. In library collections at the University of Illinois, at Harvard, and in the personal papers of long-dead executives, she found the correspondence and the funding records that the sugar men themselves had written, and that no one had thought to hide because no one had expected anyone to look.

The dental strategy, in the industry’s own words

The clearest single example Kearns uncovered concerns not heart disease but teeth. In the late 1960s the United States National Institute of Dental Research was preparing a major programme to tackle tooth decay, then a genuinely serious childhood affliction. The obvious line of attack was to reduce sugar consumption. The sugar industry saw the danger and moved to redirect the research before it began.

Kearns’s 2015 paper in PLOS Medicine, drawing on some 1,500 pages of internal documents, laid out what happened. The industry’s trade body cultivated a relationship with the very panel of experts who would help set the federal research agenda. It funded a report on the causes of tooth decay and quietly ensured that the strategies most threatening to sugar sales — simply eating less of it — were played down, while research energy was steered towards interventions that left consumption untouched: a vaccine against the bacteria that cause caries, enzymes to break up plaque, ways to interrupt decay without asking anyone to put down the sweets. When the National Caries Program’s priorities were published in 1971, a substantial share of them matched the industry’s own submitted list almost point for point. The people meant to be regulating the problem had, without quite realising it, been handed their questions by the people who profited from the problem continuing.

This is the pattern in miniature, and it is worth dwelling on because it is more insidious than a straightforward bribe. Nobody was told to lie. The scientists funded were, for the most part, real scientists doing real work. The manipulation lay upstream of them, in the decision about what would be studied at all. A field that never asks whether sugar should be reduced will never produce evidence that it should.

The tobacco parallel, made explicit

For years the comparison between the sugar industry and the tobacco industry was a rhetorical flourish, easy to make and hard to prove. Then historians found the paper trail linking them directly. The two industries shared law firms, PR consultants and scientific front men. They shared, above all, a method, later given a name by the historians of science Naomi Oreskes and Erik Conway in their 2010 book Merchants of Doubt: the manufacture of uncertainty as a product in its own right.

The method has recognisable moves. Fund research that muddies rather than settles. Attack the methodology of any inconvenient study while holding your own funded work to a gentler standard. Promote a rival villain so that public anxiety has somewhere else to go. Cultivate scientists with genuine credentials who will, sincerely, take the industry’s side. Establish nonprofit-sounding institutions to launder the money and the message. The International Life Sciences Institute, founded in 1978 with backing from Coca-Cola and other food and chemical giants, became a globe-spanning example: an organisation with the vocabulary and letterhead of disinterested science that repeatedly turned up shaping nutrition policy in ways congenial to its funders, until a wave of critical reporting in the late 2010s forced governments and the World Health Organization to keep it at arm’s length.

The reach of this machinery was not confined to the mid-century. In 2003 the World Health Organization prepared a technical report recommending that added sugars be limited to no more than ten per cent of a person’s daily energy intake. The American sugar industry’s response, made in writing, was extraordinary in its bluntness: the Sugar Association threatened to lobby the United States Congress to withdraw American funding from the WHO altogether unless the report was withdrawn or its sugar guidance softened. The episode was reported at the time and confirmed by the correspondence; it is one of the clearest illustrations on record of an industry treating a public-health recommendation as a commercial threat to be neutralised by political pressure rather than answered with evidence. The ten-per-cent figure survived, but the willingness to spend political capital to bury it tells you how the game was played long after the 1960s.

The single most effective move in the sugar playbook was the promotion of a rival villain, and the villain was fat. If the public could be persuaded that dietary fat, and saturated fat in particular, was the true cause of heart disease, then sugar could slip past unexamined. There was a specific, documented episode in which the industry paid for exactly that argument to appear in one of the most prestigious medical journals in the world — but it is a story large enough to deserve its own telling, and I have given it one in The Great Sugar Cover-Up. What matters here is that it was one manoeuvre in a campaign that ran for decades and had many others like it.

Where the record ends and the story runs on

Everything above is documented, sourced, and in most cases published in peer-reviewed journals from the industry’s own filing cabinets. Now watch the fork, because this is where a genuine scandal grows a second storey.

The documented story is one of influence: an industry that funded friendly research, steered public questions, and delayed for decades the plain advice that people should eat less sugar. The maximalist story is different in kind. In its strongest form it holds that sugar is a poison on the order of a nerve agent, that the industry knew it was killing people and hid the proof the way a chemical company hides a toxic spill, and that a single coordinated conspiracy is responsible for the entire modern epidemic of obesity and diabetes. Each of those claims goes a step beyond what the archives actually support.

Sugar in excess is genuinely bad for you, and the evidence that too much of it contributes to obesity, type 2 diabetes and tooth decay is now solid. But “bad in excess” is not “poison”, and the leap to the language of toxicology — the idea that sugar is dose-for-dose comparable to alcohol or tobacco — remains contested among nutrition scientists rather than settled. The industry manufactured doubt; the counter-myth manufactures certainty of an equal and opposite kind, and certainty of that scale is rarely warranted by a nutrition science that is still, on many specifics, genuinely unsettled.

The other overreach is the single-cause fallacy. The obesity epidemic is real, but its causes are tangled: portion sizes, sedentary lives, the collapse of home cooking, the economics of cheap calories, the marketing of everything to everyone. A story in which one industry’s spin explains all of it is emotionally satisfying and analytically wrong. The sugar men delayed the reckoning; they did not, by themselves, engineer the disease. Blaming them for everything lets a dozen other actors — including the food industry as a whole, and the policy choices that made ultra-processed food the cheapest food — off the hook entirely.

Why the doubt worked, and why it still stings

The tactic worked for a plain human reason: uncertainty is genuinely uncomfortable, and a person offered a way to keep enjoying something they like, backed by men in white coats, will usually take it. The sugar industry did not have to convince anyone that sugar was healthy. It only had to keep the question open, keep fat in the frame as the real culprit, and wait. People wanted to be reassured, and reassurance was the product on offer.

What makes the episode land so hard, when people first learn of it, is the same thing that makes MKUltra or Tuskegee land hard: it retroactively vindicates a suspicion that once sounded paranoid. Anyone who said in 1970 that the sugar lobby was steering the science would have been waved away as a crank. Kearns’s archives show they were largely right. And that is the corrosive gift the sugar industry left behind, exactly as the tobacco industry did: once you have caught an industry buying the questions, “the science says it’s fine” stops being something you can simply trust, and every subsequent reassurance has to earn its credibility from scratch.

The honest position holds both halves. A powerful industry really did spend fifty years manufacturing doubt, and we are still untangling the damage. It did not need to poison anyone to do harm; delay was enough, and delay is harder to prosecute than poison. The believer who now distrusts every food-industry study is not being foolish — they are reasoning from a real betrayal. The error is only in the size of the conclusion: from “they bought the doubt” to “everything you were ever told about food is a lie.” The first is history. The second is the shape grief takes when it goes looking for an author, the same overreach that turned an egg into a villain and back again. The sugar bowl on the table was never innocent. It was also never a nerve agent. Holding both facts at once is the whole of the work.