A moral question that has nothing to do with sex.

GR - since you are still on the company payroll, imo don't jeopardize any of your pension options.

No matter what, how or why you say anything to her in person or anonymously, you are opening a can of worms with potentially dire financial and legal consequences.

You may think you "know where you stand" with the company, but these days, torts against individuals and their employers are a vicious thing.

If her purging bothers you that much, perhaps moving to a desk/cubby further from the rest room will ease the constant reminders. Or maybe an entirely different location?

Too many people (the lady, for example) can read too many different things into anything you say or do for you to risk what you have spent years to build.

Lucky BEYOCH ! I have been wondering and trying to be make myself vomit for years! I can't do it other than getting really sick. I'm one stomach flu from my ideal weight!

Honestly - If you know others must know. You can't be the only one that knows. She must have family and friends that know. She knows, she will eventually hit rock bottom and have to do something about it or die. It's simple. It's a disease not a choice.

Sorry to let some of you guys down, but I have no ulterior motives other than her well being. For that matter, when dating outside of the hobby, I prefer women a little beyond their peak fertile years.
I guess I have always been the sort of guy who can't feel good about watching someone with so much potential possibly destroy their life. Will starting this dialog with her help, chances are no. But, I just wouldn't feel good about myself if I didn't try to intervene on some level. Deciding on what level will take some soul searching.

"You can take a horse to water, but you can't make it drink."

DADT!