There's an often quoted statistic that 95% of all people who lose much weight soon regain it. I'm skeptical of the statistic because:

I suspect the true long-term success rate is somewhere between 50% and 95%. And that if everyone who wished to lose weight were to try MacDougall/Ornish/Pritikin/Rodale/Bailey, it would be between 95% and 100%.

Last updated July 4th, 1995.