The product is a dehydrated sourdough starter from Heritage Sour, sourced from San Francisco and aged over 50 years. This 15-gram bag contains a yeast and baking agent product with less than 50 calories per serving. It is classified as a food additive, free from various allergens and artificial additives, and is suitable for those with dietary restrictions. The starter is designed for use in sourdough bread making, offering a taste of American regional cuisine. With an expiration date of 01/2030, this product provides a unique and authentic ingredient for baking enthusiasts.