I think it's a lie. This is a popular narrative for former fats. It's actually a trend for fit to fats to post before and afters and write some cry baby story about how the fit version was miserable and starving while the fat version is happy and living life. The post always goes viral and the fat poster is considered brave and victorious. This is her most popular post and there have been tons of articles written about it which got her a shit ton of followers. It's pathetic. Meanwhile, fats are like " I told you so! Skinny bitches don't eat!!!"