Chicken nuggets are in fact usually made of the same meat that you see in the supermarket, that is, broiler meat. Most chicken nuggets start as a split breast of chicken. You might read on the package that the product contains, “rib meat.” Rib meat is simply a natural extension of the breast meat. It is NOT an additive or a filler.
Other boneless chicken meat, from the legs and thighs, for example, could be added. The meat might then be marinated to enhance the meat’s juiciness and flavor. The meat is then ground and formed, just like you would form a meatball from ground product. It is then breaded and cooked, usually baked or fried in oil.
Chicken nuggets are excellent sources of protein, especially for growing kids, which are part of a healthy, balanced diet that includes plenty of fruits and vegetables.
National Chicken Council http://www.nationalchickencouncil.org/whats-in-those-chicken-nuggets/