There is also a large amount of mannitol in kelp, which has synergistic effect with potassium iodide and nicotinic acid, and can prevent arteriosclerosis, hypertension, chronic tracheitis and anemia. It also has the effect of diuresis and detumescence. The high-quality protein and unsaturated fatty acids in kelp have certain preventive and therapeutic effects on heart disease, diabetes and hypertension. Regular consumption of kelp can also make hair moist and black. Kelp is rich in carbohydrates and less in protein and fat. Compared with green leafy vegetables, kelp is rich in vitamin C, and also contains a lot of crude protein, sugar, calcium and iron. It also contains dietary fiber and is low in calories.