While oysters are nutrient-rich, you take a significant risk by eating them raw. The U.S. Food and Drug Administration warns that raw oysters may be contaminated with Vibrio vulnificus, also known as V. vulnificus, which is a pathogen that can cause life-threatening sickness. Cook your oysters first to benefit from the nutrients without risking illness.
Calories and Fat
Six, medium-sized raw oysters contain only 43 calories. The total fat content is 1.44 grams. As such, oysters are a low-fat, low-calorie food.
For so few calories, raw oysters pack a substantial serving of protein. Six, medium-sized oysters contain 4.8 grams of protein.
Oysters are a good source of essential minerals including phosphorus, calcium, potassium and zinc. The quantity of vitamins found in oysters are negligible except for vitamin B-12. A serving contains 7.35 micrograms of B-12.