Carrageenan only the lambda form (and the sodium salts of the other two) are soluble. When used in food products, carrageenan has the EU additive E numbers E407 or E407a when present as "processed eucheuma seaweed". Technically carrageenan is considered a dietary fibre. In parts of Scotland and Ireland, where it is known by a variety of local and native names, "Chondrus crispus" is boiled in milk and strained, before sugar and other flavourings such as vanilla, cinnamon, brandy, or whisky are added. The end-product is a kind of jelly similar to panna cotta, tapioca, or blancmange. Although carrageenans were introduced
Carrageenan of concern’ in infant formula as food for special medical purposes at concentrations up to 1000 milligrams per litre. The use of carrageenan in infant formula, organic or otherwise, is prohibited in the EU for precautionary reasons, but is permitted in other food items. In the UK, the Food Standards Agency issued a product recall for sweets containing carrageenan, stating that carrageenan “is not permitted as an ingredient in jelly confectionery products as it presents a choking hazard”. Carrageenan has been studied in laboratory animals for its potential effects on intestinal and immune functions following oral intake or gavage, with