Learn why the campaign to reduce fat in our diet is the best example yet of how the science of nutrition can get highjacked by the ideology of nutritionism. For 30 years Americans obsessed about eating low-fat food. Food companies translated this into a marketing strategy and produced scores of processed food products that could be labeled as low-fat or no fat. However, many of these products had high amounts of added sugar. In the end, the low-fat campaign did more to confuse people and decrease health than it helped people to get healthier.