I certainly couldn't say for sure without a drug test but I wouldn't be shocked if she did. The Olsen twins have been famous, in the spotlight and neck deep in their own franchise since they were really small. As a consumer it's great for me because they have much of the final say on what they do and what they put their name on, making for an age appropriate product. However, as a parent, it's worrisome to see these girls so far into the spotlight that they can't help but feel constantly pressured to be happy and thin and fabulous all the time! It's fairly well known that kids want boundaries, even if they don't say it out loud. If they don't get them from parents they will either act out until they find a boundary set by a higher authority, like the police, or they'll set some limits of their own in the form of eating disorders or compulsive behaviors. It doesn't really matter what got her into treatment, the important thing is that she asked for help and took steps to heal herself.