This product is a dehydrated organic sourdough starter from San Francisco that is over 125 years old. It comes in a 15 gram bag and has an expiration date of 01/2030. The product is wheat-free, vegan, and has many other food specifications like being nut-free, GMO-free, and low in sugar and fat. It is a unique and heritage-rich addition to any kitchen, perfect for those interested in traditional San Francisco-style sourdough bread.