Gelidium is the main raw material for extracting agar, which is also called watercress, foreign powder and gelatin. It is a very important vegetable gum and belongs to fiber food. Agar is generally used to make cold food, jelly or microbial culture medium.

Gelidium is rich in minerals and vitamins, among which alginate has the function of lowering blood pressure and starch sulfate has the function of lowering blood fat, so Gelidium is a kind of food that can lower blood pressure and blood fat.

Gelidium, transparent in color, like jelly, tastes crisp and tender, and is generally used to make cold dishes or bean jelly. Gelatin jelly is a summer food. It is cool and can help clean the stomach.

Gelidium is mainly distributed in Taiwan Province Province, Hainan, Xisha Islands and other sea areas, also known as sea frozen vegetables, HongLing, phoenix tail and so on. And it is a kind of red algae. Chinese medicine believes that cauliflower can clear lung, eliminate phlegm, clear heat and reduce fire, cool blood and stop bleeding, and relieve summer heat. Studies have shown that eating cauliflower and other foods regularly can absorb the water in the intestine, make the intestinal contents swell, increase the amount of defecation, and help relieve constipation.