1. Fresh kelp in spring (the sea area in autumn is cold and hard) is soaked in clear water for 24 hours, then drained, and then fried in casserole (avoid iron). When the sea is brought into the pan and fried to a critical point, it will have a unique aroma. Temperature and frying technology are particular, which is easy to burn and lose its original taste and nutrition. Generally, it is recommended to decoct with slow fire for about 10 minute to obtain kelp powder. Kelp vinegar has unique taste and good nutrition, and is an excellent drink for health care and longevity.

2. Efficacy: Kelp is called kelp in ancient times, and it is called "longevity dish" by the people. It is a highly nutritious marine plant. Kelp can quickly restore normal blood pressure, reduce blood lipid viscosity and control urine sugar index, which is of great help to people who stay up late for a long time, drink alcohol, have irregular diet and irregular work and rest time. Because of its natural iodine content, kelp was widely popularized after the founding of New China to help eliminate thyroid diseases in inland areas.