In the following decades, when being rail-thin became ever more desirable, nearly all dieting advice stressed meals that were low calorie. There was the grapefruit diet of the 1930s (in which people ate half a grapefruit with every meal out of a belief that the fruit contained fat-burning enzymes) and the cabbage-soup diet of the 1950s (a flatulence-inducing plan in which people ate cabbage soup every day for a week alongside low-calorie meals).