 This study examined the effects of soybean meal on the intestines of rainbow trout. It found that the intestines of fish-fed soybean meal had increased permeability which could be measured by the presence of sugar molecules in their bloodstreams and the amount of bacteria present in their blood. Additionally, it was observed that the more soybean meal the fish consumed, the greater the amount of bacteria in their blood. This suggests that soybean meal may cause damage to the intestinal lining, allowing for the passage of larger molecules into the bloodstream. This article was authored by Payment Mosberry in Tanja, Margarith Verland, Thor Landsverk, and others.