The product is a dehydrated sourdough starter from Heritage Sourdough, with a history of 155+ years. This organic starter comes in a 15 gram bag and is sourced from San Francisco. It is wheat-based and has an expiration date of 01/2030. This yeast and baking agent is perfect for baking homemade sourdough bread, with various food specifications like being GMO-free, vegan, and low in sugar and fat. This starter is ideal for those looking for a traditional and authentic San Francisco-style sourdough starter for their baking needs.