Cabbage, also known as agar, agar and cabbage, and some commodities are also written as cold weather and cabbage swallow, which is a kind of marine algae plant rich in gum. It is regarded as a substitute for fish glue and is often used for desserts such as salad, cabbage cake or jelly. It will also be used in the laboratory, usually as a culture medium for bacteria or in molecular biology experiments. Cabbage is extracted from red brown algae. Raw watercress is white and translucent, and can be bought in the market in different forms such as powder, horn, strip and filament. In the use of food processing, it can be made into pudding, jelly, tea jelly, coffee jelly and so on. The taste is crisp compared with other common food processing materials used for coagulation.

Chinese medicine believes that cauliflower is cold, sweet and salty, and belongs to liver and lung meridians; It can clear away lung-heat, eliminate phlegm, clear away heat and dampness, nourish yin and reduce fire, cool blood and stop bleeding, and has the effect of relieving summer heat.

Gelidium is rich in minerals and vitamins, especially alginates, which have antihypertensive effect, and sulfates of starch, which are polysaccharides, have lipid-lowering function and have certain preventive and therapeutic effects on hypertension and hyperlipidemia. Often eat some "agar" products, it can absorb water in the intestine, which is the expansion of intestinal contents, increase the amount of stool, stimulate the intestinal wall and cause defecation; Gelidium also has the functions of heatstroke prevention, detoxification and heat clearing.