3. Oysters can help you lose weight! They are low in calories, low in fat and a good source of protein which makes you feel fuller after eating. 4. Oysters are a good source of other essential nutrients. These include vitamins A, E, and C, zinc, iron, calcium, selenium, and vitamin B12.5. Oysters can help improve your energy. They are a good source of iron which helps the body transport oxygen to individual cells giving you more energy.hey are low in calories, low in fat and a good source of protein which makes you feel fuller after eating. 4. Oysters are a good source of other essential nutrients. These include vitamins A, E, and C, zinc, iron, calcium, selenium, and vitamin B12. 5. Oysters can help improve your energy.