In 1967, the Sugar Industry Paid Harvard Scientists to Blame Fat. We're Still Living With the Consequences
In 1967, the Sugar Research Foundation, now known as the Sugar Association, faced a serious problem. A growing body of scientific evidence was linking sugar consumption to heart disease. This threatened their entire industry. So they did what many industries do when the science turns against them: they paid for research that would tell a different story.
The Sugar Research Foundation handed $50,000 to three Harvard scientists, equivalent to roughly $500,000 in today's money. Their job was simple: review the scientific literature and publish a paper that blamed saturated fat for heart disease, not sugar. The result was published in the New England Journal of Medicine in 1967, and it became one of the most influential and damaging pieces of nutrition propaganda ever written.
This isn't speculation. In 2016, researchers Stanton Glantz, Cristin Kearns, and Laura Schmidt published a peer-reviewed analysis in JAMA Internal Medicine of internal Sugar Research Foundation documents they'd uncovered. The documents showed exactly what happened: industry payments, specific instructions to downplay sugar's role, and explicit direction to pin blame on fat.
We're still living with the consequences of that corruption. That 1967 Harvard study helped trigger a shift in dietary guidelines that lasted decades. It shaped how nutritionists, doctors, and your government advised you to eat. And it paved the way for an obesity and diabetes epidemic that continues today.
How Big Sugar covered its tracks
The Sugar Research Foundation's internal documents, now public, show a calculated strategy. The foundation identified a Harvard professor, D. Mark Hegsted, along with two colleagues, and offered them $50,000 to write a literature review. The foundation's goal was explicit: to counter "negative" studies linking sugar to heart disease.
One internal memo stated the foundation wanted the review to "emphasize the insufficiency of evidence" against sucrose (table sugar). The foundation didn't want truth. It wanted reasonable doubt.
Here's what makes this particularly damaging: one of the three scientists they paid, D. Mark Hegsted, didn't just publish this compromised review. He later became the Head of Nutrition at the U.S. Department of Agriculture. He helped draft the federal dietary guidelines. Your government's official nutrition advice, from the 1970s onward, was shaped by a man whose early influential work had been funded and directed by the sugar industry.
The impact was staggering. One funded review, published in a prestigious journal, became cited as authoritative evidence. Thousands of subsequent studies and policy decisions built on that foundation. By the time the corruption was revealed fifty years later, the damage had already been done.
The 1977 Dietary Guidelines: when low-fat became gospel
In 1977, the U.S. government released the first official Dietary Guidelines for Americans. The core recommendation: reduce fat intake. Americans were told to cut saturated fat, reduce their fat consumption overall, and eat more carbohydrates. The guidelines became the basis for all nutrition education that followed: the food pyramid, school lunches, hospital diets, nutritionist training, corporate wellness programs.
This single shift in dietary guidance shaped what billions of people ate for the next forty years.
The problem wasn't just that the guidelines were wrong. The problem was what the food industry did with that permission. If fat was the enemy, then food companies could replace fat with sugar and claim they were making food healthier. A low-fat yogurt loaded with added sugar was now virtuous. Low-fat salad dressings, loaded with sugar and seed oils, became "healthy choices." Breakfast cereals were marketed to children as part of a healthy balanced diet.
Your cupboards filled with products engineered to be low in fat but high in refined carbohydrates and sugar. The industry had been handed a gift: official government permission to replace one problem ingredient with another, while claiming health.
What happened when everyone followed the low-fat advice
The timeline tells a stark story. The low-fat era began in 1977. Look at what happened next:
1980s: Obesity rates begin climbing, particularly in children. Before 1977, obesity in children was stable. After 1977, it accelerated sharply.
1990s onwards: Type 2 diabetes, once called "adult-onset diabetes" because children rarely got it, starts appearing in children. Diabetes rates explode. Metabolic syndrome becomes epidemic. Cardiovascular disease rates don't improve as the guidelines promised. In many populations they worsen.
The low-fat, high-carb diet didn't reduce heart disease. It triggered an obesity and metabolic crisis. Yet the guidelines remained unchanged. Most governments didn't substantially revise their dietary recommendations until the 2010s, and even then, reluctantly and incompletely.
Consider the scale of this failure: Tens of millions of people followed official dietary guidance that was, at its foundation, shaped by industry money and corruption rather than robust science. The consequences persist today in the bodies of people living with obesity, diabetes, and metabolic disease.
The science that was ignored: Ancel Keys and cherry-picking data
The 1967 sugar industry study didn't emerge in a vacuum. The blame-fat narrative had been building since the 1950s, primarily through the work of researcher Ancel Keys and his famous Seven Countries Study.
Keys' study showed a correlation between saturated fat consumption and heart disease, but it had a fatal flaw: it was selective. Keys looked at data from 22 countries, but his published study included only seven of them. He chose the seven countries that fit his hypothesis about fat and heart disease. When researchers Yerushalmy and Hilleboe later analyzed all 22 countries, the correlation between fat and heart disease disappeared.
This wasn't subtle. Keys cherry-picked his data, published the cherry-picked version as definitive proof, and the nutrition world built an entire edifice on that selective analysis. When data is incomplete, correlation isn't just uncertain, it's meaningless.
But the fat-is-dangerous narrative was now established. It was easy to understand. It was funded. It had prestigious institutional backing. And the sugar industry was happy to amplify it. Blaming fat meant not blaming sugar.
John Yudkin saw the truth and was destroyed for it
While Keys was building his cherry-picked narrative, a British researcher named John Yudkin was publishing something different. In 1972, Yudkin released a book called "Pure White and Deadly" that warned about the dangers of sugar. He presented evidence linking sugar consumption to obesity, diabetes, heart disease, and metabolic dysfunction.
Yudkin was right. But he was systematically discredited. The sugar industry funded studies that attacked his work. Nutritionists dismissed him. His career was damaged. He died in 1995, largely forgotten, his warnings unheeded.
It wasn't until 2009, when researcher Robert Lustig delivered a lecture called "Sugar: The Bitter Truth" that Yudkin's work was rediscovered and vindicated. Everything Yudkin had warned about in 1972 had come to pass. The epidemiology was now undeniable. But by then, a generation had grown up eating low-fat, high-sugar products while being told it was healthy.
The pattern is clear: When a researcher told the truth about sugar, the industry worked to destroy them. When researchers could be paid to blame fat instead, they received funding and prestige. Follow the money, and you see how narratives get built.
Big Sugar's more recent playbook: The Coca-Cola Files
You might think the sugar industry learned a lesson from the 1967 scandal. They didn't. In 2015, the New York Times and Public Health Advocacy Institute published revelations showing that Coca-Cola had spent at least $120 million funding scientific research and influential organizations to shift blame from sugary drinks to physical inactivity.
The strategy was the same as in 1967, just more sophisticated and scaled. Fund researchers who would emphasize exercise rather than sugar reduction. Fund organizations that promoted the message that no food is bad, only portion control matters. Create doubt about the link between sugary drinks and obesity and diabetes.
The internal Coca-Cola emails showed executives discussing how to use research funding to shape the scientific narrative. This wasn't isolated or coincidental. It was deliberate industry strategy. And it worked. The idea that exercise matters more than diet, that all calories are equal regardless of source, that it's just about balance and moderation, entered the public conversation largely because the industry funded it.
Where are we now? The evidence is overwhelming
The World Health Organization recommends that added sugar should comprise no more than 10% of daily calorie intake, ideally less than 5% for optimal health. For a 2,000-calorie diet, that's about 25 grams of added sugar per day maximum.
The average British adult consumes 60 to 80 grams of added sugar daily, roughly three times the WHO recommendation. British children consume even more, sometimes double the recommended amount.
The evidence on what sugar actually does to your body is now undeniable. Stanhope's 2009 research in the Journal of Clinical Investigation showed that fructose, the primary form of sugar in sugary drinks and processed foods, drives insulin resistance, fatty liver disease, metabolic syndrome, and elevated triglycerides. These aren't minor effects. These are the primary drivers of metabolic disease.
Sugar consumption is linked to obesity, type 2 diabetes, cardiovascular disease, non-alcoholic fatty liver disease, gut dysbiosis, inflammation, and cognitive dysfunction. The mechanisms are understood. The dose-response relationship is clear. This isn't debatable among researchers who haven't been funded by the industry.
Yet the average person is still more likely to fear fat than sugar. The narrative that was built by industry corruption in 1967 persists. It's embedded in government guidelines that still recommend grains and carbohydrates as the foundation of a healthy diet. It's embedded in nutrition textbooks that many university students still learn from. It shapes what food companies produce.
Follow the money: when funding predicts the outcome
In 2013, researchers Bes-Rastrollo and colleagues published a systematic review in PLOS Medicine analyzing the relationship between industry funding and research outcomes. Their finding: studies funded by the food or beverage industry were four to eight times more likely to reach conclusions favorable to the funder than independent studies.
This isn't anomalous. It's the rule. When an industry funds research, the results favor the industry about 90% of the time. This isn't necessarily because researchers are consciously dishonest. It's because funding shapes which questions get asked, which methodologies are used, which data gets emphasized, and which inconvenient findings get buried.
The 1967 sugar industry scandal wasn't the beginning of food industry influence on nutrition science. It wasn't the end either. It was the most famous example of a pattern that continues today.
This is why you should be skeptical when you hear that new research shows chocolate is healthy, or that dietary fat is fine, or that portion control matters more than what you eat. Check who funded the research. Look at the methodology. See if it aligns with the weight of independent evidence. Many studies are honest. Some are not. Some are honest but funded by interested parties, which shapes which questions get asked and which don't.
What actually happened to nutrition science when the industry got its way
The 1967 sugar-funded review didn't just influence dietary guidelines. It shaped how nutritionists thought about nutrition. It shaped how doctors were taught. It shaped what questions researchers asked and what questions they avoided. It shaped what food companies produced. It shaped food labeling. It shaped school lunch programs.
One corrupted study, cited hundreds of times, became the foundation for a framework that affected billions of people's eating habits. That's the power of publishing in a prestigious journal. That's the power of funding. That's the power of a simple, repeatable narrative.
The lesson you should take from this is not that all nutrition science is corrupted. It's that you need to think about incentives. When someone makes a dietary recommendation, ask yourself: who benefits if you believe this? Who paid for the research? Who profits from the recommendation? Are the mechanisms explained? Is the recommendation consistent with evidence from independent sources?
The fat-is-bad narrative benefited the sugar industry and the companies that make sugary products. That's not a coincidence. The narrative persisted because it aligned with the financial interests of powerful industries. Now that we know the history, you can be more discerning.
The lesson that matters for what you eat today
You're not responsible for what happened in 1967. But you are responsible for what you choose to eat today, now that you know the history.
The evidence on sugar is clear. It drives metabolic dysfunction. It drives obesity. It drives diabetes. It's not a neutral food. The dose matters. The frequency matters. The type of sugar matters (fructose is more damaging than glucose). And the evidence is independent of industry funding. Researchers who have no financial interest in sugar, across multiple countries and institutions, reach the same conclusions.
Fat is not the enemy. Refined sugar is. Seed oils are not neutral. Whole foods are not equivalent to processed foods stripped of fiber and loaded with added sugar. These aren't controversial statements anymore. They're reflections of what the independent science actually shows.
You were given bad guidance for decades because industry money corrupted the scientific process. Now you know. What you eat from here forward is your choice.
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