It is well known that eating fish can be healthful because of its abundant protein,amino acid and poly-unsaturated fatty acid like DHA(Docosahexaenic Acid), and the DHA can intensify our heart and blood's function which can be healthy for our body.
Thereby, the fish can not be eaten frequently today because of the heavy pollutants from the environment. There is a poisonous substance named azoth present in the water of fish living, which can destroy the function of heart and blood heavily. Moreover, its poisonous function is stronger than the DHA's healthy function, so eating these fish can't be healthful any more, what's worse, the reversed facet plays a great role in damaging our body!
