1. Different plant sources: Thallus Laminariae is not a plant in botany, but both belong to laminariales, while Thallus Laminariaceae in laminariales and Thallus Laminariaceae in laminariales, so the relationship between them is a bit like a "cousin". There were no kelp in ancient China. In Japanese, laminariales is collectively called Kunbu, so they are often confused.

2, shape difference: kelp shape is mostly folded into a ball, or tangled into a handle, the color is mostly dark brown or green brown, after drying, there will be a layer of hoarfrost on the surface, which is actually salt. After soaking in water, it will expand into a flat strip with thick middle and thin edges, and it will also be wavy and fishy. The shape of kelp is curled and shrunk into irregular blocks, and its appearance is black. Thinner than kelp. After soaking in water, it is flat leaf-shaped, with small teeth or entire edges. The two are relatively easy to identify.

3. Different nutritional values: The nutritional components of kelp and kelp are also slightly different. They are all rich in some natural polysaccharides, but according to the test, the polysaccharide content of kelp is much higher than that of kelp. Moreover, kelp has higher nutritional value and higher price than kelp because of its different growth environment and less pollution.

4. Efficacy and function: Although the nutritional value of kelp and kelp is slightly different, the efficacy is similar. They are rich in iodine, which can improve thyroid function and prevent goiter. The white frost on kelp and kelp surface is beneficial to the swelling of water. In addition, they also contain alginic acid, which can improve the elasticity of human blood vessels, clean up cholesterol and fat in blood vessels, promote blood circulation and reduce the occurrence of cardiovascular diseases. Regular use of them can prevent arteriosclerosis and tertiary diseases.