If yu read the Body Ecology Book, it explains what real sauerkraut is. Real sauerkraut is cultured vegetables which you should prepare at home. The store bought and health food sauerkraut is usually not good for you due to the heat processing and preservatives which kill the good in it. Chapter 14 in this book teaches you to make your own "super" foods which are supposed to have an enormous healing capacity due to the tons friendly bacteria that grow and convert the natural sugars and starch into lactid acid. These cultured veggies are supposed to be alkaline and cleansing. Please refer to the book for a better explanation
Hope this helps!