Children can eat more freshwater fish, freshwater fish contains a lot of nutrients can promote the absorption of growth and brain supplement. Fish mainly contains protein, inorganic salts, unsaturated fatty acids, folic acid and iron, sodium, calcium, phosphorus and other trace elements, as well as vitamin B12 and other nutrients. When cooking fish, try to choose a light cooking method, which will retain a large number of fish inside a variety of nutrients, so that the fish to play a maximum effect, without wasting its nutrients. Although freshwater fish has many benefits, it is not suitable for everyone, especially those who are prone to allergies. However, it should be noted that a single diet has a weak effect on growth and brain supplementation, and more attention should be paid to a balanced diet, more exposure to outdoor sunlight, and more proposed sports.