But the fementation process is not fermentation as in yeast and sugars making alcohol, it is just ozidating. It's a fun one to throw at the healt food folks, they can't answer it and it leaves them baffeled.
When they talk about low carbs remind them that sourdough starter consumes most of the cards in the starter, therefore they should be promoting sourdough bread.
Just like anything you can manipulate the "Facts" to suit what you want to prove.
Remember lard ard butter are "natural" products.