Its algae body is purplish red, the top is often green, shaped like a fan, flat, growing on the rocks with calm waves in the intertidal zone, mainly distributed in the Atlantic Ocean, the southeast coast of China and the sea area of Bo Huang. In China, there are mainly carrageenin, spiny carrageenin and Japanese carrageenin.

Carrageenan is not only one of the important algae for producing carrageenan, but also contains a large number of active substances, such as seaweed pigments, fatty acids, amino acids, sterols, polysaccharides and vitamins, which generally have good biological activities.

Extended data

Carrageenan is a kind of large algae with low fat and high protein. The algae body is rich in essential amino acids and vitamins, and the unsaturated fatty acids, the main active substance in fatty acids, account for a large proportion. Carrageenan has good research value.

Carrageenan extract has antitumor, antiviral, antioxidant, anti-aging and antibacterial activities. Carrageenan is also one of the important sources of carrageenan, which will get more development and research in the future.

The total sugar content is high, reaching more than 50%, the crude fat content is extremely low, and the crude protein content is high. Therefore, carrageenan belongs to low-fat and high-protein plants and has good application value.

Carrageenan is an important polysaccharide component in carrageenan, which is a hydrophilic colloid. It is mainly composed of potassium, sodium, magnesium and calcium sulfate of galactose and a polymer with 3, 6- dehydrated galactose. It is usually prepared by hot water extraction and alcohol precipitation. Carrageenan in carrageenan is mainly λ-carrageenan and κ -carrageenan

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