How soybeans took over the American diet – without anyone noticing

U.S. farmers are projected to produce 4.52 billion bushels of soybeans in 2026, roughly 800 pounds per American, yet most people never eat soybeans directly. Instead soy shows up as oil in salad dressings and fried foods, lecithin in chocolate and bread, and protein in cereals and energy bars, a transformation traced from Chinese domestication thousands of years ago to Henry Ford's 1930s soybean-car experiments and disastrous soybean luncheon.

The real shift came after World War II, when wartime oil shortages pushed processors toward domestic soybean oil, and postwar demand for protein-rich livestock feed generated a surplus of cheap oil that food manufacturers absorbed into margarine, shortening, and processed foods. By 2008 soybean oil made up about 80% of the 18 billion pounds of edible oils Americans consumed annually, arriving invisibly rather than by anyone's deliberate taste for it.

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