I am 420 lbs. and having bpd/ds, has anyone lost more than 200 lbs.?

I would like to get to 170 or 160 lbs. It seems like it is hard to find people who have lost 200 lbs. or more. If you have, what did you do to lose so much wieght when others may not even get close? Thank You -Becky Adair-

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.