Yeah, so i kinda wanna read a manga about a main character with an eating disorder.
It can be any genre.

Wonders How To Post A Picture

There's a chapter in DOLL: IC in a Doll about a character with an eating disorder.

In Hitsuji no Namida the main girl has eating disorder but it is not the main point

Anorexia - Shikabane Hanako wa Kyoshokushou (A lot of other problems too, so the eating disorder kind of gets overshadowed by other stuff)

~4400 manga completed
~1700 ongoing...

So i played with some tags: Boxing manga as especially Ashita no Joe (10/10) or RRR (7,5/10) go into demanding weigh loss regiments and Moteki (8/10) has a shallow take on the theme but you are looking for Cousin (8/10) or Bara no Tame ni (8,5/10) if you want to read a proper exploration of the the in a believable fashion.
Uchuu o Kakeru Yodaka (7/10) had the lead changes bodies with comically inhuman blob. It´s not that deep ok but it is gaining substance. Hehe.
Join team fat today and Zephyr from Harbinger is a rare obese superhero. A movie is comming and DC has Suicide Squad´s leader Amanda Waller who got a de-aging and slim down recently. Cough bullshit cough. [img]https://gracetopia.files.wordpress.com/2011/09/wallervbatman2.jpg[/img]

Forgot: River's Edge and Tetsugaku Letra (6/10 to both) are ok i guess.
Both versions of the topic are more of a Bande dessinée / US independent comic topic than manga if you want to dig deeper into the theme as it isn´t that japanese...
The fitting Strangers in Paradise or Love and Rockets lasted for quite some time.
Join team comics today 😀 !

I also read EU/US comics and am a librarian.
Manga-Masters, My ANN-Lists + Imdb