23 Oct 2018 --- Adding highly refined fiber to processed foods could have negative effects on human health, such as promoting liver cancer, according to a study by researchers at Georgia State University and the University of Toledo. The researchers note that the findings should lead to caution in enriching processed foods with fibers, especially in light of the FDA ruling from June which will encourage the marketing of fiber-fortified foods as healthy. However, in response, suppliers have pointed out that this was an animal study, thereby questioning its applicability to humans.