Why diets are bad for you
Fad diets promise more than they deliver
Most fad diets promise rapid, substantial weight loss, but when weight is lost quickly, it’s mostly fluid that’s eliminated, and that will inevitably go straight back on when normal eating is resumed.
One example is the Cabbage Soup Diet, of which there are various versions. It promises up to 4kg (10lb) weight loss in 7 days, but almost invariably results in weight gain as soon as it ends.
See also: Top 30 spring foods for weight loss