The Sugar Industry Paid Harvard to Blame Fat

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Issue #031   ·   Food Lies   ·   June 2026

The Sugar Industry Paid Harvard to Blame Fat

In 1967, three Harvard scientists published a study in the world's most prestigious medical journal clearing sugar of any role in heart disease and pinning the blame on fat. The sugar industry had secretly paid them to write it. The scientist who got it right was ridiculed into obscurity. Fifty years of dietary advice — and the cholesterol panic that emptied the egg aisle — was built on the result.

John Yudkin spent the last years of his career being called a crank. He was a respected British physiologist — founder of the nutrition department at Queen Elizabeth College in London — and in 1972 he published a book arguing that sugar, not fat, was the dietary force behind the explosion of heart disease in the modern world. He titled it Pure, White and Deadly.

The reaction was brutal. His findings were dismissed at conferences. His studies were kept out of journals. A prominent colleague described his work as 'science fiction.' Invitations dried up. By the time he died in 1995, the field had moved on without him, and the book was out of print. The official consensus — the one printed on government dietary guidelines and repeated by every doctor — was that Yudkin had been wrong, and that the real enemy was saturated fat.

He wasn't wrong. And in 2016, a researcher digging through a Harvard archive found the paper trail proving exactly how the consensus that buried him had been built — and who had paid for it.

Two Men, One Question

By the late 1950s, two scientists were racing to answer the most urgent nutritional question of the era. Heart disease deaths in the United States had been climbing sharply since the 1940s. Something in the modern diet was killing people. The question was what.

Ancel Keys was an American physiologist at the University of Minnesota — brilliant, prolific, and politically connected in a way few academics ever manage. He was convinced he'd found the culprit: saturated fat. His diet-heart hypothesis held that saturated fat raised blood cholesterol, and high cholesterol caused heart attacks. It was clean, intuitive, and it became the foundation of nutritional orthodoxy for the next half-century.

Yudkin thought Keys was looking at the wrong molecule. The data, as he read it, pointed to sugar — sucrose and fructose — as the driver of heart disease, obesity, and diabetes. The two men were not collegial rivals. Keys publicly attacked Yudkin's work as worthless and used his considerable influence to push it to the margins. Keys was the better-connected, more aggressive operator, and on the question of who shaped public opinion, he won decisively.

What nobody outside a few industry offices knew was that the contest hadn't been entirely fair.

The Harvard Letters

In 1954, the Sugar Research Foundation — the lobbying arm of the American sugar industry, today called the Sugar Association — spotted what its own president called a 'strategic opening.' If Americans could be convinced that fat caused heart disease, they would eat less fat and more carbohydrate. More carbohydrate meant more sugar. So the industry set out to fund the science that would get them there.

By 1964, the foundation's vice president, John Hickson, had proposed an internal programme to counter 'negative attitudes toward sugar' by funding research to, in his words, 'refute our detractors.' In July 1965 — two days after a newspaper ran a prominent story linking sugar to coronary heart disease — Hickson made his move. He approached three scientists at Harvard's nutrition department: Mark Hegsted, Robert McGandy, and their department chair, Frederick Stare.

The deal was a literature review. Hickson would pay the team the equivalent of $50,000 in today's money to survey the existing research on fat, sugar, and heart disease and reach a conclusion. He supplied the studies he wanted examined. He received and reviewed drafts. The project ran long because new studies implicating sugar kept appearing, and the team kept revising to rebut them.

The deception held for decades. The industry's role was first hinted at in 1984 and only fully exposed in 2016, when Cristin Kearns of the University of California San Francisco uncovered the original correspondence and published her analysis in JAMA Internal Medicine. By then, all three Harvard scientists were dead. As Stanton Glantz, Kearns's co-author, summarised it: anything written against sugar was treated as suspect, while research against fat got a free pass.

How a Paid Paper Became Federal Law

A bought review in a medical journal is a scandal. What makes this one consequential is what happened next.

Mark Hegsted — one of the three scientists the sugar industry had paid — went on to become head of nutrition at the United States Department of Agriculture. In 1977 he helped draft 'Dietary Goals for the United States,' the Senate report that became the template for America's first official dietary guidelines. Those guidelines told Americans to cut fat. They said comparatively little about sugar.

The food industry did exactly what you'd expect. If fat was the enemy, the answer was low-fat products — and food stripped of fat tastes like cardboard. So they replaced the fat with sugar. Low-fat yoghurt, breakfast cereal, salad dressing, bread, ready meals: all reformulated, all sweeter. The low-fat era maps almost perfectly onto a steep rise in sugar consumption and a tripling of obesity rates. The advice meant to make people healthier helped engineer the opposite.

The sugar industry used the tobacco playbook — fund friendly scientists, publish in credible journals, cultivate the policymakers, attack the critics. The difference is that the sugar version became the basis of national dietary policy.

The Egg That Was Never Guilty

Caught in the same net was an unlikely victim: the egg.

Dietary cholesterol — the cholesterol you eat, as opposed to the cholesterol your liver makes — got classified as dangerous. Eggs, being rich in it, became a health hazard. Doctors told patients to limit them. Guidelines capped dietary cholesterol at 300 milligrams a day. People ordered egg-white omelettes. 'No cholesterol' became a selling point on packaging.

The trouble is that dietary cholesterol barely moves blood cholesterol in most people. The body makes its own — far more than you could ever eat — and regulates production accordingly. Eat more, and the liver typically makes less. Researchers had been quietly pointing this out for years.

In 2015, the US Dietary Guidelines Advisory Committee finally conceded the point. They removed dietary cholesterol from the list of 'nutrients of concern,' noting there was no appreciable relationship between the cholesterol you eat and the cholesterol in your blood. Decades of egg-avoidance, retired in a footnote. No press conference. No apology. The egg aisle never got its retraction.

The Number Nobody Wants to Talk About

Here's where it gets genuinely uncomfortable — and where the honest answer is 'it's complicated' rather than a clean villain story.

The entire diet-heart hypothesis rests on a chain: saturated fat raises LDL cholesterol, and high LDL cholesterol — the 'bad' kind — causes heart disease and death. The first link is real for many people. The second is where a stubborn body of evidence refuses to cooperate.

In people over 60, high LDL cholesterol is, in study after study, associated with living longer, not dying sooner. A 2016 systematic review pooled 19 studies covering more than 68,000 people aged 60 and up. In 16 of them, higher LDL was linked to lower all-cause mortality. A 2024 analysis of the large ASPREE trial in healthy older adults pointed the same way. The pattern even has a name: the cholesterol paradox.

Then there's the most-prescribed drug class on earth: statins, which lower LDL. For people who already have heart disease — secondary prevention — the benefit is solid and worth having. The argument is about primary prevention: healthy people with no heart disease, taking a statin to prevent a first event. There the numbers get smaller than most patients realise. A Cochrane meta-analysis put the figure at roughly 138 low-risk people taking a statin for five years to prevent one cardiovascular event. The relative-risk reductions quoted in adverts sound impressive; the absolute benefit for a low-risk individual is modest, and reasonable doctors disagree about where the line should sit.

None of this means cholesterol is harmless or statins are a scam. It means the story sold to the public — fat is poison, LDL is the enemy, lower is always better — was a simplification that started with a paid review and hardened into something nobody was allowed to question.

Yudkin named sugar in 1957. The industry paid Harvard to bury the idea in 1967. The guidelines enshrined the wrong villain in 1977. The cholesterol panic emptied the egg aisle for forty years. And the science underneath it all turned out to be far messier than the confident advice ever admitted.

The science was contested. The funding wasn't. Three Harvard scientists knew exactly who was paying them, and exactly what conclusion was wanted.

Yudkin was right. His career didn't survive long enough to matter.

SOURCES

Kearns, C.E., Schmidt, L.A., Glantz, S.A. — 'Sugar Industry and Coronary Heart Disease Research: A Historical Analysis of Internal Industry Documents.' JAMA Internal Medicine, Vol. 176, No. 11 (2016). DOI: 10.1001/jamainternmed.2016.5394

McGandy, R.B., Hegsted, D.M., Stare, F.J. — 'Dietary Fats, Carbohydrates and Atherosclerotic Vascular Disease.' New England Journal of Medicine (1967). The paid Sugar Research Foundation review.

Yudkin, J. — Pure, White and Deadly. Originally 1972; republished Penguin Books (2012) with foreword by Robert H. Lustig.

Ravnskov, U. et al. — 'Lack of an association or an inverse association between low-density-lipoprotein cholesterol and mortality in the elderly: a systematic review.' BMJ Open (2016). DOI: 10.1136/bmjopen-2015-010401

Johnson, K.W. et al. — 'Low-Density-Lipoprotein Cholesterol and Mortality Outcomes Among Healthy Older Adults: A Post Hoc Analysis of the ASPREE Trial.' Journals of Gerontology: Series A (2024).

Orkaby, A.R. — 'The Highs and Lows of Cholesterol: A Paradox of Healthy Aging?' Journal of the American Geriatrics Society (2020). DOI: 10.1111/jgs.16302

Taylor, F. et al. — 'Statins for the primary prevention of cardiovascular disease.' Cochrane Database of Systematic Reviews (2013). NNT ≈ 138 over 5 years.

Byrne, P. et al. — 'Statins for primary prevention of cardiovascular disease.' BMJ analysis on absolute risk reduction and NNT (2019).

US Dietary Guidelines Advisory Committee — 2015 Scientific Report, chapter on dietary cholesterol. health.gov/dietaryguidelines

Siri-Tarino, P.W. et al. — 'Meta-analysis of prospective cohort studies evaluating the association of saturated fat with cardiovascular disease.' American Journal of Clinical Nutrition (2010). DOI: 10.3945/ajcn.2009.27725

Mente, A. / PURE study investigators — dietary fat, carbohydrate and cardiovascular mortality. The Lancet (2017).

Nestle, M. — Food Politics. University of California Press (2002).

Lustig, R.H. — Fat Chance. Hudson Street Press (2012).

NPR — '50 Years Ago, Sugar Industry Quietly Paid Scientists to Point Blame at Fat.' September 2016.

Scientific American — 'Sugar Industry Secretly Paid for Favorable Harvard Research.' September 2016.

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