I recently stumbled upon fitness tik tok, and the sheer number of people admitting to engorging themselves one week then absolutely starving themselves another is really wild. Supposedly the goal is to get "cut", but it really feels like what wrestlers used to do in my high school lol
I mean, it can be pathological, but isn't necessarily. If you're doing it with a goal in mind and can stop whenever you want, it's not a disorder.