Oysters are a valuable source of protein, vitamins and minerals needed for good health.
A 3-ounce serving, or about 6 oysters, is a good source of protein and low in fat. That same serving has only 58 calories and 46 milligrams of cholesterol. These shellfish are an excellent source of the minerals iron and zinc, as well as vitamin B12. Iron functions primarily as a carrier of oxygen in the blood and muscles. Vitamin B12 assists in forming red blood cells and in building genetic material.