Well, I can't say to what extent people are actually intolerant to gluten or not. But it is clear that sourdough DOES break down gluten during fermentation. He

Well, I can't say to what extent people are actually intolerant to gluten or not. But it is clear that sourdough DOES break down gluten during fermentation. Here's a lucid observational demonstration of that ... (https://www.youtube.com/watch?v=vsCpdCsJFr4 https://www.youtube.com/watch?v=vsCpdCsJFr4) -- it's in French, but they have really good bread making videos.