Oysters are rich in vitamins and minerals, particularly vitamin B12, vitamin D, copper, zinc, and manganese. Vitamin B12 is crucial for brain health, and its deficiency can lead to dementia and mental health issues. The combination of vitamin D, copper, zinc, and manganese with calcium in oysters helps prevent osteoporosis. Oysters are also an important source of selenium, and its deficiency can cause cardiovascular disease, infertility, and cognitive decline. However, eating raw oysters carries a risk of food poisoning, especially for individuals with cancer, diabetes, and liver disease. Immediate medical attention is advised if symptoms of poisoning occur after consuming oysters.