> After about five years, 41 percent of dieters gain back more weight than they lost. Long-term studies show dieters are more likely than non-dieters to become obese over the next one to 15 years.
> ... The study found that a single diet increased the odds of becoming overweight by a factor of two in men and three in women. Women who had gone on two or more diets during the study were five times as likely to become overweight.
More [earlier]:
> men with severe obesity have only one chance in 1,290 of reaching the normal weight range within a year; severely obese women have one chance in 677. A vast majority of those who beat the odds are likely to end up gaining the weight back over the next five years...
https://www.nytimes.com/2016/05/08/opinion/sunday/why-you-ca...