Carrageenan is a food additive derived from red seaweed that has been used for centuries as a thickener and stabilizer. It's found in an enormous range of products: dairy alternatives like almond milk and coconut milk, deli meats, infant formula, ice cream, yogurt, salad dressings, and many processed foods. Despite its natural origin, carrageenan has become one of the most debated food additives in recent years.
What Carrageenan Does
Carrageenan acts as a gelling agent, thickener, and emulsifier. In dairy products, it prevents separation and gives a creamy texture. In dairy alternatives, it replicates the mouthfeel of whole milk. In meat products, it helps retain moisture and improves texture. These functional properties make it extremely popular with food manufacturers.
The Inflammation Controversy
The controversy around carrageenan centers primarily on research by Dr. Joanne Tobacman of the University of Illinois at Chicago, who has spent decades arguing that carrageenan — even food-grade carrageenan — promotes intestinal inflammation and may contribute to gastrointestinal conditions including irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). Her work prompted the National Organic Program to temporarily ban carrageenan from certified organic products in 2016, though this decision was later reversed.
What Regulatory Agencies Say
The FDA, European Food Safety Authority (EFSA), and World Health Organization (WHO) have all reviewed the evidence and concluded that food-grade carrageenan is safe for consumption. Major regulatory bodies point to the distinction between food-grade carrageenan and "degraded carrageenan" (poligeenan), which is produced using acid hydrolysis and is known to be harmful but is not permitted in food.
Who Should Consider Avoiding It
Despite regulatory approval, some individuals with inflammatory bowel conditions, IBS, or digestive sensitivities report improvement when eliminating carrageenan. If you have chronic gastrointestinal symptoms, it may be worth eliminating it for a few weeks and observing any changes. Look for products labeled "carrageenan-free," especially in plant-based milks and creamers.