Fish is important to humans as a nutrient source of low-fat, high-quality protein. It is also a good source of omega-3 fatty acids, vitamins D and B2, calcium, phosphorus, iodine, iron, zinc, magnesium and potassium, which are essential for healthy living.
Fish is highly recommended by the American Heart Association to be included in the diet at least twice a week because it helps to lower the risk of cardiovascular diseases. In addition to having a healthy heart, fish helps in having a healthy brain. The omega-3-fatty acids, particularly EPA and DHA, help in the brain and vision development of infants while still in the womb. Some good sources of omega-3-fatty acids are salmon, trout, tuna, herring and sardines.