1. Protein and amino acids

The life-active substances of seaweed are very important for plant life activities. Edible seaweed generally has a protein content of 38-43, which is much higher than that of ordinary vegetables, and has a high content of essential amino acids. The general composition of seaweed (on a dry matter basis) is protein 43.6, fat 2.1, carbohydrate 44.4, fiber 2.0, and ash 7.5. Porphyry protein contains more neutral and acidic amino acids such as alanine, aspartic acid, glutamic acid, glycine, proline and other neutral and acidic amino acids, which is a characteristic that terrestrial vegetables and other plants do not have.

2. Fat

Compared with terrestrial plants, the fat content of seaweed is low, mostly below 1. Among the fats of seaweed, saturated fatty acid palmitic acid accounts for the vast majority , about 20; the content of myristic acid and stearic acid is less, accounting for 2 respectively; the content of unsaturated fats that have a good effect on human health-linoleic acid, linolenic acid or stearidonic acid is high, It is 10-30, and there is also a certain content of highly unsaturated fatty acids above C20. At the same time, seaweed contains a high content of eicosapentaenoic acid, which has been compared to "brain gold", accounting for about 30%.

3. Vitamins

Seaweed contains a variety of vitamins, and the content of B vitamins is comparable to that of vegetables. The content of B vitamins in seaweed, especially vitamin B12, which is almost non-existent in land plants, is very high. In terms of dry matter, the content of vitamin B12 is similar to that of fish, and the content of vitamin C is also very high.

4. Inorganic matter

Seawater contains extremely rich inorganic components. Seaweed has the function of absorbing and accumulating inorganic matter in seawater, so some seaweed is rich in inorganic matter.