Kelp, also known as kombu, belongs to the edible algae group. The advantage of eating kelp is that it is rich in many nutrients, such as vitamins, dietary fiber, minerals and trace elements, especially high iodine content, which is an important source of iodine for human body and has high nutritional value. However, if it is an excessive amount of kelp or special people eating kelp may also have bad effects. Benefits: 1, iodine: kelp is rich in iodine, which is a raw material for the synthesis of human thyroxine and can prevent goiter caused by iodine deficiency and cretinism caused by insufficient secretion of thyroxine; 2, control of blood lipids: kelp is rich in taurine, which can help increase the metabolism of lipids and cholesterol and help control blood lipids; 3, control blood pressure: kelp is rich in potassium, which can regulate the body’s sodium-potassium Balance, reduce the body’s absorption of sodium, which is good for controlling blood pressure; 4, control blood sugar: kelp contains a lot of rock algae polysaccharide, which can effectively delay the time of gastric emptying and small intestine digestion and absorption, thus helping to control blood sugar and avoid dramatic fluctuations in blood sugar. Second, the bad: kelp is rich in iodine, patients with hyperthyroidism should avoid eating kelp to avoid aggravating the disease; pregnant women should also eat kelp in moderation, excessive consumption may affect the development of the thyroid gland of the fetus in the womb.