Mutton is a type of red meat and is rich in high-quality protein and many vitamins and minerals including iron, zinc and vitamin B12. It also helps prevent anemia and may help support muscle growth with regular consumption. Mutton does contain a moderate amount of saturated fat but if consumed organic, is still considered a great meat to consume as part of a healthy diet. Lamb is very rich in iron, mostly in the form of heme iron and is crucial for various bodily functions.