The efficacy of eating fish properly is as follows: 1, reduce the incidence of cardiovascular diseases, because fish is rich in polyunsaturated fatty acids, and polyunsaturated fatty acids can inhibit the aggregation of platelets in the blood, so that blood viscosity decreases, and the efficacy in preventing chronic metabolic diseases such as atherosclerosis, coronary heart disease and myocardial infarction is obvious; 2, educational and brain health, improve the ability to think quickly, because the fish in Polyunsaturated fatty acids can promote the metabolism of the nervous system, and have a preventive and alleviating effect on Alzheimer’s disease and declining thinking ability; 3, to supplement the body with trace elements, such as zinc, selenium, iron, manganese, these trace elements as an important component of the body enzymes and coenzymes, to promote the smooth biochemical metabolism of the body has an important effect.