Comprehensive Study Links Low-Fat High-Carb Diets to Higher Mortality Risk

A recent study published in The Lancet goes a long way towards solidifying experts’ claims, arguing that it is, in fact, sugar, not fat, that poses the biggest dietary risk to public health. Despite decades of policies and diets that target fat as the biggest culprit—largely thanks to compromised research funded by the sugar industry—scientists, as well as the general public, are finally turning their sights on sugar.

The Dangers of a Low-Fat Diet

The study, presented during the congress of the European Society of Cardiology in Barcelona, demonstrates that eating a small amount of lipids and a large amount of sugar makes for an unsettlingly dangerous diet. After 7 years of research with 135,000 participants on 5 continents, the authors concluded that high sugar intake drives up mortality rates. In fact, the findings read: “High carbohydrate intake was associated with higher risk of total mortality, whereas total fat and individual types of fat were related to lower total mortality.” ¹

Dr. Mahshid Dehghan, a researcher at the University of Hamilton and author of the study, along with nearly twenty colleagues studied the diets of people aged 30 to 75 in 18 different countries. The nutritional habits of each participant were cataloged using surveys taken over the course of 7 years. The data, after being divided into 5 sections according to the amount of fat ingested, reveals a striking result: those who ate the least amount of fat were the ones with the highest mortality rates. In other words, the participants who ate more fat saw their risk of premature death diminished by 23 percent, as compared to the group with a lipid-poor diet. Carb intakes of more than 60 percent of total energy per day were associated with an increase in the risk of non-cardiovascular disease and stroke. What’s worse, those who compensated for low-fat intakes with a high consumption of carbs and sugar had an even higher risk of mortality.

Tides Turning in Research on Fat and Sugar

According to these results, the study’s authors praised a high rate of fat intake as part of a healthy diet: “Our findings indicate that limiting total fat consumption is unlikely to improve health in populations, and a total fat intake of about 35 percent of energy with concomitant lowering of carbohydrate intake might lower risk of total mortality.”

While this is hardly the first study to come out in the last two decades contradicting years of health claims that frame fat as an insidious threat to public health, it is one of the most comprehensive. What’s more, it cuts to the heart of the fat versus sugar debate that has been a major preoccupation of scientists, regulators, and the general public (particularly in the U.S.) since at least the 1960s. In an interview with Reuter’s Health, Dr. Dehghan said simply, “We are hoping that dietary guidelines are reconsidered in light of the new findings.” ²

Dr. Rosmy Barrios, MD

This article has been medically reviewed by Dr. Rosmy Barrios, MD.

Dr. Rosmy Barrios, MD is an aesthetic medicine specialist whose work focuses on patients who are treated for obesity, metabolic syndrome, and other weight-related issues through nutritional analysis, keto diet programs, and supporting medications.

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Ryan Mernin

Ryan is a freelance writer and editor based in Philadelphia. He has edited books of Chinese philosophy, interviewed bands as a music journalist, and labored over satirical treatises in the candlelit hours of the early morning. He has also tended bar.

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