A chicken liver provides a healthy dose of iron, zinc, Vitamin A and B. Iron enables your body to use oxygen efficiently and to make new red blood cells. Zinc plays a role in wound healing, immune system function and cell division. One chicken liver contains 7.41 micrograms of vitamin B12, which is significantly more than the 2.4 milligrams you need each day. A single 1-ounce serving of chicken livers contains about 130 percent of your daily recommended intake of vitamin A. Vitamin A promotes good vision; it can also help reduce the impact of macular degeneration and fight cataracts and other vision disorders. Vitamin A also contributes to healthy skin, digestion and immunity.