Hey Sandi!
Master Cleanse, as you found, isn't really great for long-term sustainable weight loss...so if you want something sustainable, that probably isn't the way to do it. Luckily, you can find all kinds of other sustainable ways of losing weight here.
You may want to visit our Featherweights forum, for those with less to lose, or the 40-somethings forum.
Look around, find a spot, and settle in...can't wait to get to know you better.