It's no wonder why Weight Watchers is Oprah Winfrey's favorite healthy eating program: it's so freakin' effective. We've seen tons of beautiful transformations and heard countless successful weight-loss stories thanks to the program's flexible, realistic approach (and the fact that you don't have to eliminate any food groups!).

Ahead are some recent treasures we've uncovered — personal transformation stories shared with the Instagram community about perseverance, hard work, and a lot of Weight Watchers success.