Carrageenan is a seaweed deriviative often used as a thickener in soy and dairy products. Recent research confirms previous findings that carrageenan may be contributing to irritable bowel syndrome and Crohn’s. If you suffer from GI issues, check labels to see if this thickener is used in your favorite desserts, like frozen soy or dairy treats. Omit the products for 2-4 weeks to see if symptoms improve.