Overall, oysters are very healthy for you being low in calories and high in quality proteins and important nutrients. They are also a great source of Vitamin B12, zinc, copper, and important antioxidants. Due to the nature of oysters and their natural habitats, they may contain bacteria and other contaminants. This is usually only a concern in raw oysters and is curbed by cooking. That being said, if one has some health challenges, check before eating raw oysters. If you want to know more about the nutritional value of oysters, check out this short article.