I've been starving myself&purging for the past 6 months, and now I'm suddenly gaining weight. I've stopped purging, and started taking calcium supplements since I heard starvation can cause calcium deficiency. I'm still doing lots of exercise and consuming less than 1500 calories every day, but I've gained like 7 pounds in like 3 weeks, and I'm wondering why? And please don't post the idiotic "omg don't starve yourself!" or "you should be eating more than that!" Thanks, TIPS, that's really not helpful. I'd really appreciate any intelligent answers? How could I have gained that much weight in 3 weeks? I do two hours of exercise almost every day, and my caloric intake isn't that high!