Is the fish head a "brain replenisher", or a "toxin nest" or a "heavy metal collector"?

Some claims about fish heads circulated among the public. One of the most famous, is the "fish head can supplement the brain" and "fish head contains a lot of toxins, heavy metals, can not eat", today we will talk about the fish head, first of all, eat the fish head brain has a certain reason, the fish head contains the lack of lecithin in the fish meat. Fish heads contain two essential unsaturated fatty acids, commonly known as "brain gold". Proper intake contributes to brain development and can also prevent Alzheimer's disease. Fish head contains a lot of toxins, heavy metals, can not eat? Under normal circumstances, it is safe to eat fish heads. When buying fish and making fish, it is generally recommended: when cooking the head of the fish, be sure to cook it thoroughly. Purchasing from a formal market that is regulated by government departments can ensure food safety to the greatest extent.