Sourdough bread that contains brown wheat flecks and potentially fermented mother may be 'fake sourdough' and can cause bloating, whereas pure white sourdough with a slightly sour smell is considered authentic.

“Like when it has like the brown like wheat flex in it, I feel like they probably have the fermented like mother or whatever and then I feel like they must add flour like added that's not because then I definitely get bloated from that. That's fake sourdough, right?”