I am not a health nut--challenged myself over the years with several marathons and finished a half ironman 2 years ago. But I still try to do weekly cardio and bike rides so my weight is not causing my issue. I could probably solve my apnea with a dental device but the way I read the FAA guidance is that only mild sleep apnea can be treated with this. For now I have to comply with CPAP usage and get my doctor to sign off it.
And concur with prior posts--read the latest literature...all we heard about eggs, butter, animal fats, etc the past few decades has been re-evaluated.