Comment by a9h74j

I listened to the podcast, which as it says focuses in particular on John Mew and son, John apparently being on the cruel and crank end by experimenting on his children including on his daughter with expected negative results, and his son now reportedly showing a flair for bringing pseudosciency selective evidence to promotion on social media, and more recently perhaps helping "incels" fix "weak chins." (AKA, perhaps a focus for unstated outrage to help motivate a slightly-weak podcast)

I was offered a tongue depressor by my childhood dentist to help fix a crooked tooth without orthodontia, so when Nestor's book mentioned one orthodontist suggesting that positioning one's tongue to touch the roof of the mouth would matter, I dismissed that part as probably the weakest in the book. That said, the science overall seems to be evolving, research in breathing and the nose apparently increasing, and Nestor is meticulous in maintaining references, including online. Many might be comfortable with some uncertainty and not dismissing this all as pseudoscience. I commend Nestor's reporting.

I also hope that, if industrial civilization eventually passes, and for now where severe poverty without dentistry exists, people will find again whatever practices better prevented dental caries.