This particular starter originates from The Netherlands and was used by my family for generations, so a very long time (pre 1900), before the ready-to-use dry yeast now found in every supermarket. Through the very long rise time (5 to 6 hours) most of the nutrients will be partly broken down which means that it will be better absorbed by the body. Also, this old Dutch bread will be good for at least 2 weeks! Making this bread yourself is very easy and a blessing for the digestive system. It will asure you of a soft stool. This bread has a specific, light sour taste and the original Dutch name for the bread with this sourdough was called "Zuurdesem Brood".