This has been reported many times here but I’ll add my n=1 to the growing data set:
Now, in my 3+ weeks of low carbs (<= 20g/day), along with the numerous other benefits I’m enjoying in my own life, my wife tells me that my snoring - i.e., that jet noise that’s been bugging her for over a decade - has suddenly stopped. Gone.
My guess: low level inflammation I’ve apparently had all these years has been markedly reduced - clearly, my no-longer-achy joints and muscles are telling me this much! But this has also likely decreased the size of previously-swollen breathing passages, slightly enlarging those narrower airways in my head.
Now, if only someday my wonderful wife would follow me down the path of this new healthy lifestyle…