I'm leaning towards drugs as well, though of course that's my opinion only. Kate Moss is known for drugs. Unfortunately, modeling is usually cruel to the body. The only way to be 5'11 or greater and that thin, for high style runway, is to have hyperthyroidism or unnatural methods. Rarely is someone truly that thin. I know from my short exposure to it. Luckily, i didn't give a shit when they kept saying loose 5 pounds. That is how they try to be subtle about weight loss. It's always 5 pounds, endlessly.