@j-lo, I was hoping you would post as you seemed to have experience of eating this way combined with Buteyko, I appreciate the long post and the wealth of info you have afforded me.
I must admit the ONLY thing that has improved my health has been following Matt’s advice and although I recognise that Buteyko and increasing CO2 certainly works, it felt like I had to sacrifice eating more to work on the reduced breathing.
I must admit I wasn’t up on the biology namely that CO2 was generated more with a higher metabolism so I will certainly be focusing more on food, sleep, exercise (which I am glad to say I have actually started to have the energy for) and doing Buteyko to supplement those rather than the main focus.
I look forward to a time when “My chest, neck, shoulders, and abdominal muscles are entirely relaxed.” as my breathing seems to be all over the place at times. I find that most of the tension in this area is caused/exacerbated by eating and getting trapped wind/burps. Although when my temps are up, or I have been doing Buteyko, I find food goes down easier. Will this sort of thing improve with better metabolism?