Compared to most meats, chicken is a great source of protein and has less fat, particularly the breast, which has half the fat of a steak. Niacin, which has cancer-preventing qualities, and the trace element selenium are both abundant in chicken. Additionally, it contains plenty of vitamin B6, which works well with niacin to help the body turn proteins, fats, and carbohydrates into usable energy. It also promotes cardiovascular health.