Thank you for the responses!
She's 36. She started out at just under 300. She's now down to 230, and it was lost over a period of about 6 months. She's still losing, though not as quickly as she was.
I've been trying to hard to get her to overcome this. I'm not bothered by it (though she has herself convinced that I am), I'm just glad that she's starting to feel healthier. She's talked about surgical options, but I must admit that I have some misgivings in going that route.
It is getting better little by little. I've done a fair amount of research on this and from what I've seen everywhere, it's something that improves on its own in time, with exercise and good diet. She's definitely got the good diet part down. She eats like a bird most of the time.
I think we may start looking into some different clinical options soon, at least tentatively. I can't make the choice for her, but I'm going to continue strongly encouraging against the surgical option at least for the time being.
Thanks for the input, and any other advice would be much appreciated.