Shelley Duvall

I was watching the slightly disturbing 3 Women today and noticed immediately that Shelley Duvall was shockingly thin. She couldn't have weighed more than 80lbs, if that. I was wondering if she struggled and an eating disorder of any kind. Do you know what I found? I never read anything about her having an eating disorder but I don't think she did because "Olive Oyl" was her nickname when she was younger. She was not fond of the nickname and almost turned down the role of Olive Oyl in Popeye because of it. She really looked freakishly skinny in the movie The Shining.