I went to Overeaters Anon for many years and it helped me stay on track with my weight (stayed in the range 180-220 for 5 years or so
with lots of biking). I quit going because I split up with my gf who also went to OA. Then I gained a lot of weight got up to 352.
In the last 6 months I have lost 79 pounds (273) and changed my eating by portion control and eating only healthy non processed food.
The weight has come off easily and the changes are actually enjoyable enough to be permanent (I hope). I've been thinking of going back to OA.