Carrageenan (also known as irish moss) is an ingredient added by food scientists to make processed foods more palatable. It's in everything from Tasti D-Lite soft serve ice cream to Applegate Farms Organic Roast Turkey Breast. It's added to processed foods by food scientists to thicken or emulsify or prevent ice crystals from forming. I wasn't concerned about it's presence in so many of the foods in my kitchen because it is made from seaweed and we don't have a problem with it. Then I started speaking with people about their reaction to processed foods containing carrageenan--all had digestive symptoms that continued on a gluten free diet. All spoke to me about how they didn't have the same digestive problems with less processed versions of the same food. One reacted to Almond Breeze almond milk but not to homemade almond milk. Another person reacted to Applegate Farms turkey but not roasted turkey.
There may be soon be a scientific explanation for these reactions to Carrageenan. The American Journal of Physiology published an article by researchers in the Department of Medicine at the University of Illinois which said "exposure of human intestinal epithelial cells to carrageenan triggers a distinct inflammatory pathway...the study findings may represent a link between genetic and environmental etiologies of inflammatory bowel disease." 1 Interestingly, rats also had an extreme reaction to carrageenan and developed bloody diarrhea. 2
Still, like gluten, carrageenan is everywhere and avoiding it means avoiding a lot of processed foods including most ready made milk substitutes--Silk Soy Milk, Almond Breeze and Whole Foods 365 Organic Ricemilk all use carrageenan as a thickener. It is also an ingredient in most ice creams. If you have digestive issues, you can try to to tease out if you are having a reaction to this additive by comparing how you feel after eating a less processed food (like fresh turkey) with a processed version (Applegate Farms organic roasted turkey breast.) Or avoid processed food completely for a week then load up on food with this ingredient to compare how you do.
Not everyone is sensitive to carrageenan-it might be a subgroup of people who reacts to this additive. Our family has never had a reaction to carrageenan, but anecdotally, I know a lot of people who are sensitive to gluten who react to carrageenan so it is something to think about if you continue to have digestive issues on a gluten free diet.
Once again, homemade is best whenever possible--especially if you are still having chronic symptoms.
1. http://ajpgi.physiology.org/content/292/3/G829.full
2.http://www.plosone.org/article/info:doi%2F10.1371%2Fjournal.pone.0008666
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