RFK Jr. promised to define ‘ultraprocessed’ food. What's taking so long?

A definition would help Americans eat healthier food, experts say. It's turned out to be harder than expected

美国政府承诺为“超加工食品”给出正式定义，但两个多月过去仍无进展。专家指出，定义难产既源于分类标准本身存在边界模糊，也源于食品行业的强烈游说反对。