There is a layer of creamy white stuff on the surface of dried kelp, which is a nutrient - mannitol. It has the effects of lowering blood pressure, diuresis and reducing swelling, so be sure not to wash it off.

2. It can be boiled to make it easier to digest.

1. How to clean fresh kelp:

1. Soak in hot water first. Generally, use water to moisten and soften the stains. In order to soften the stains faster and more thoroughly, it is best to soak them in hot water for half an hour.

2. Use a brush again to remove the dirt better. Anyone who has washed kelp will know that the surface of kelp will produce a very slippery film, which is difficult to clean by hand. But if you use a brush If it is, it will be much easier to rub it off with the head of the brush, because it has already been soaked in water.

3. You can use salt water to sterilize again. If you soak it in salt water for 10 minutes at this time, it will have a good effect.

2. How to soak kelp in vinegar:

1. Go to the market to buy an appropriate amount of thick-skinned kelp, wash the skin and set aside.

2. Cut the kelp into small pieces and set aside.

3. Put an appropriate amount of water in the pot, add an appropriate amount of salt, pour in the kelp pieces and blanch the water, then take them out and rinse them with clean water and set aside.

4. Wash an appropriate amount of red pepper and cut into small sections for later use.

5. Put an appropriate amount of water in the pot, pour an appropriate amount of rice vinegar and bring to a boil. Then pour the red pepper into the pot while it is hot and stir evenly. Add an appropriate amount of salt, sugar and light soy sauce and stir evenly.

6. Finally, pour in the kelp pieces and soak for half a day.