One of the best sauerkraut soups originates from Slovakia. Fermented sauerkraut has many health benefits. It is naturally gluten free, rich in dietary fiber, vitamin C, K and iron, and is low in calories. There are many versions of sauerkraut soup, but this one is the most popular. Because of the health benefits and low calories, this soup is an excellent choice when following a healthy well-balanced diet. The best part is, that it tastes delicious!