It certainly is an issue here. The pressure to be slim is enormous amongst the local population. All these ads and clinics are not aimed at the expats.
I would be concerned for any Caucasian girl who already has image/weight issues who moves here. Just look at the nonsense on this board, where 'fat' and 'expat' are invariably used together. Even slim ladies feel like whales here.
My only direct experience of anorexia here was a local lady who ended up dying. The hospital treatment over the years was not very good.