As well as being delicious, Roast Duck is a good source of protein, iron, vitamins A, B and E … and selenium. The latter is a useful anti-oxidant which helps protect us from heart disease and some cancers. Even though it is the particular blend of fat that gives a meat its distinctive flavour, more and more consumers are seeking to avoid excessive fat in their diets. The good news is that duck fat is relatively high in poly-unsaturates and relatively low in cholesterol.