Boudin sourdough starter continuity claim

Boudin Bakery at Fisherman’s Wharf claims its San Francisco sourdough starter dates back to 1849 and is continuously used in its breads. This origin claim is part of Boudin’s longstanding marketing and is documented by the company at its flagship location. Food historians and microbiologists note that while the company’s claim is plausible and widely cited, continuous, unbroken lineage of a starter over 170+ years is difficult to verify scientifically and is sometimes questioned. The Boudin Bakery retail and demonstration bakery is located at Fisherman’s Wharf where the claim is showcased to visitors.