This is the starter we use in all our sourdough baking here at Breadtopia. A hearty strain of wild yeast that has served us well for almost 40 years. Fed, nurtured and dehydrated for a long, stable shelf-life. For thousands of years, sourdough starter has been used to healthily and naturally leaven bread. Containing naturally occurring yeast and friendly Lactobacillus bacteria, sourdough starter also adds its own unique flavor profile to baked goods. Plus it's good for your gut. Ingredients: Organic wheat flour and wild yeast culture.