Goose liver is the liver of the goose belonging to the duck family.Europeans consider goose liver alongside caviar and truffles as "world's three delicacies"."The world's three great delicacies.".Goose liver is rich in carbohydrates, proteins, fats, cholesterol, and minerals such as iron, zinc, copper, potassium, phosphorus, and sodium, with blood-nourishing and eye-protective effects.