Eating extremely large amounts of liver regularly can contribute to excessive vitamin A intake. For most healthy adults, occasional consumption of properly cooked chicken liver isn't inherently dangerous, but eating unusually large quantities on a frequent basis is unnecessary.

There is another issue that deserves more attention: undercooked chicken liver.

Unlike a chicken breast, where bacteria are primarily found on the surface, bacteria can potentially be present throughout liver tissue. Simply searing the outside while leaving the center raw or very rare may therefore not provide adequate protection.

Chicken liver should be cooked thoroughly rather than served raw or undercooked.

This is especially important for people who are pregnant, older adults, young children, and people with weakened immune systems.

So the claim that chicken liver is “poisonous” is misleading.

Properly cooked chicken liver can be part of a balanced diet.

3. The Chicken Tail or “Pope’s Nose”

The fatty tail section of a chicken is sometimes called the “Pope's nose.” In some cultures, it is considered a delicacy.

The tail itself is not a naturally poisonous part of the chicken.

However, it contains a relatively high amount of fat compared with lean chicken breast.

There is also an anatomical structure called the uropygial, or preen, gland near the base of the tail. This gland produces an oily secretion that birds use during feather maintenance.

The presence of this gland is sometimes used online to support dramatic claims that the chicken tail is toxic.

That's an oversimplification.

The chicken tail is not generally considered a poisonous food simply because the preen gland is located there. Nevertheless, people who prefer leaner meat may choose to remove the tail because of its fat content and because it isn't necessary for a nutritious meal.

What About the Dark Material Inside a Chicken?

The photograph accompanying viral posts can make a cooked chicken look alarming, especially when dark tissue, blood-colored juices, fat, or internal organs are visible.

But dark coloration does not automatically mean poison.

Chicken contains myoglobin, a protein associated with muscle tissue, and cooked poultry can sometimes retain pinkish or reddish areas depending on the cut, cooking method, and other factors.