Dietary Guidelines for Americans 2026 point to a complex dismay confronting politics and science

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The 2026 updates to the Dietary Guidelines for Americans have generated dismay and concern for the population health, as they overturn the dietary pyramid proposed in 1995 by Willett and subsequently followed for the next 30 years, and they conflict with the results of the North Karelia Project, which enabled Finland’s transition from a country at high risk to one at low risk for ischemic heart disease. So-called healthy diets, based on the dietary pyramid and investigated in a large English study in 2026, including the Mediterranean Diet—whose definition was decisively influenced by the Seven Countries Study—have demonstrated an increase in life expectancy of up to three years in both men and women. It is highly significant that such an increase in life expectancy among middle-aged men studied in the Italian areas of the Seven Countries Study had already documented, many years earlier, this advantage of the Mediterranean Diet. Whether following the dietary pyramid and the Mediterranean diet in particular where grains and fresh vegetables are abundant and animal products are scarce with olive oil for cooking or the reversed pyramid with more red meat and whole dairy products and a concomitant higher consumption of saturated fats with beef tallow as a cooking fat, is also of a problem of political-industrial nature. Beyond the long-debated and more strictly scientific question concerning low carbohydrates and low saturated fat intake in the diet to reduce the incidence of ischemic heart disease, the overall quality of fresh or freshly prepared foods must certainly also be considered, and not only nutrient composition—an additional element that has recently been added to this controversy.