Prawns are an extremely good source of protein, yet are very low in fat and calories, making them a very healthy choice of food.
Although they have a high cholesterol content (195mg cholesterol per 100g of prawns), they are low in saturated fat, which is the fat that raises cholesterol levels in the body and is bad for you. For this reason, there is no need to avoid eating too much of them, as the cholesterol in the food is not the same as the cholesterol in one's blood.
A 4 oz (115 g) portion of shrimps contains almost half the recommended daily protein needed but only contains 112 calories and less than 1g of fat.
They also contain a lot of omega-3 fatty acids, but these fatty acids are good for you and help prevent against heart disease, circulatory diseases and many other types of illnesses.
And finally they also contains high levels of vitamin B12, zinc, iodine, phosphorous, potassium, selenium and iron and have smaller quantities of calcium, magnesium and sodium. HTH