My guy, being fat is not the same as having a hard to pin down chronic illness.
I say this as a guy who does not remember a day where I wasn’t concerned about my weight, who only recently managed to drop from obese to over weight. You can fix being fat. You can fix fat with diet and exercise. You can’t fix “maybe lupus? Maybe MCTD? I dunno it’s probably autoimmune? We’re going to need to order more tests” with diet, exercise, magic crystals, or whatever other random bullshit people like to suggest.
Seriously, just, no.
Because not only all of that other stuff, but you’re also extremely unlikely to be the first person to suggest it.
A buddy of mine is constantly being told she just needs to go out and exercise a little more, or take this supplement or that supplement, or see a fucking chiropractor. She has been for as long as I’ve known her. She doesn’t remember the last time she heard something unique. Though the number times she’s been told to just get a spinal adjustment for an autoimmune disease is frightening.