🌍 Industrial production (corn starch → glucose → isomerization to fructose; HFCS is a mixture; pure fructose syrup 55-90% fructose; global food/beverage industry)
🕰️ ~1970s US (HFCS production; isomerization enzyme glucose-isomerase); soft drink industry adoption 1980s; 2000s high-fructose pure syrups for food service