Carrageenan is a polysaccharide derived from red seaweed. It is commonly used as a thickener, stabilizer, and emulsifier in a variety of food products, including protein powders. It is particularly useful in enhancing the texture and mouthfeel of protein powder mixes.
Carrageenan has been a subject of controversy regarding its safety. Some studies suggest that carrageenan may cause inflammation and digestive issues in certain individuals, while others indicate that it is safe for consumption. The US Food and Drug Administration (FDA) has categorized carrageenan as Generally Recognized as Safe (GRAS) for use in food at levels consistent with good manufacturing practices. However, some people may experience adverse effects from carrageenan consumption, such as gastrointestinal symptoms, and it may be best for these individuals to avoid protein powders containing carrageenan.