The brain marrow in duck heads contains a lot of cholesterol, which may damage human blood vessels.

Animal pecking will eat substances containing harmful heavy metals, which are mainly stored in the brain tissue, and the older the animal is, the more it is stored and the more toxic it is.

Eaters enjoy the delicious flavor while ingesting heavy metal poisons, which may cause a toxic reaction if consumed in excess. Therefore, chicken head, duck head, goose head and other parts should not be eaten more.

Expanded:

Other parts of the animal can not eat:

Fish "Black coat"

Most fish have a layer of black membrane coat on both sides of the abdomen, for the fish body is the most fishy, earthy taste is stronger parts, and contains a large number of histamine, lipids and lysozyme, accidental consumption of histamine will cause nausea, vomiting, abdominal pain and other symptoms; lysozyme has an inhibitory effect on the appetite.

Chicken head

Take the chicken, folk proverb: ten years of chicken head race arsenic. It means that the older the chicken is, the more toxic the head is. With the modern medical point of view to analyze, the reason is that the chicken in the pecking will eat into the material containing harmful heavy metals, these heavy metals are mainly stored in the brain tissue, the older the chicken, the more storage, the more toxic it is.

People's Daily News - chicken head fish "black coat" these parts of the animal can not eat