Start baking authentic San Francisco sourdough at home with this certified organic freeze-dried starter from Good Gut Tribe. Made in the UK, this 5g sachet activates in 24 hours and yields over 50 loaves of tangy, classic boules. The culture is freeze-dried for a 12-month shelf life, so you can store it unopened and revive it whenever you're ready. Once activated, your starter lives indefinitely with weekly feedings. Includes detailed UK instructions and lifetime support from a small family maker in Hampshire. Perfect for home bakers who want consistent, bakery-quality sourdough without the weeks-long process of building a starter from scratch. Vegan, no additives, no commercial yeast, and certified organic by the Organic Food Federation.