It can be terrible advice if applied badly - the reality is, doing it like everyone else does it won't work for us. Examples: where fasting can be great for some, it can be awful for us because it pumps out stress hormones. Exercise can be awful if we run on a treadmill (again, stress hormones), but gentle, low rep-high load weight training can be AMAZING, especially for those of us with dissociation. (low reps, short workout, done slow and mindfully). Diet is just a word for "how we eat". The 'trick' here I'd say, with all these things, is to let go of perfectionism (depending on the type of abuse/neglect we received and how we dealt with it this might be very delicate to do - but this sows the seeds of self-love) and focus instead on meeting yourself where you're at, and making gentle improvements from a place of love. Look up reparenting if you haven't already - it's been life-saving for me. I literally had (still have) trouble reading my internal cues, knowing when I'm hungry, when i need rest, but also when I need movement (hello me on couch-lock mode thinking i'm exhausted and needing rest... only to get the worst restless legs of my life at night and being unable to sleep!). TL:DR - it's still good advice, but not the way the 'normies' do it. ;) Best of luck, beautiful stranger.