Carrageenan is a polysaccharide composed of linear chains of sugar residues, primarily galactose. It is extracted from various species of red algae, most notably from Irish moss and other seaweeds. There are three main types of carrageenan – kappa, iota, and lambda – each with distinct properties that tailor their functionality in food applications. Kappa carrageenan forms strong gels in the presence of potassium ions, while iota carrageenan creates softer gels with calcium. Lambda carrageenan, on the other hand, remains soluble and does not gel, making it suitable for use in products where thickening is desired without gel formation.
