Kelp is no stranger to us, it is a regular guest on our dinner table and often appears in various styles of dishes. There are many benefits of eating kelp regularly, it can lower blood pressure, lower fat, lower sugar, lose weight, prevent breast enlargement, diuretic and reduce swelling, etc. So kelp has so many benefits and is a vegetable with high nutritional value. Does this mean that it is suitable for everyone? The answer is obviously no, although kelp is good, but some people must not eat. These people mainly have the following categories, pay attention to yo: 1, pregnant women, because the kelp has the effect of promoting birth, eat more kelp during pregnancy, will cause miscarriage; and kelp contains very high iodine, too much consumption will affect the development of the fetal thyroid gland. 2, lactating women, after consumption by lactating women, the iodine in kelp will enter the baby’s body with blood circulation, which may cause thyroid dysfunction in the baby. 3, hyperthyroidism patients, kelp is rich in iodine, people suffering from hyperthyroidism will aggravate their condition after consumption. 4, infertility of men, kelp in the mercury content is very high, once entered the body, the mercury element can be directly combined with the red blood cells, and then impede the operation of reproductive cells, affecting the normal fertility. 5, the spleen and stomach cold people, because the kelp is cold, the spleen and stomach cold people eat after the symptoms will be aggravated. These people should not eat kelp. There is also eating kelp, can not be arbitrary, or need some taboos: 1, do not eat kelp immediately after drinking tea, and do not immediately eat sour fruit. Because the kelp is rich in iron, the tannin in tea and sour fruit in the plant acid will hinder the absorption of iron. 2, kelp is likely to contain toxic substances arsenic, so it should be soaked in water for two or three hours before cooking, and the water should be changed once or twice in between. 3, kelp should not be eaten with licorice.