A team, led by Professor David Levitsky, devised a five-week eating study, where the food intake of paid volunteers was measured Mondays to Fridays.
For the first week, the group ate whatever they wanted from a buffet. For the next two weeks, half the group selected their lunch by choosing one of six shop-bought portion-controlled foods, such as Campbell's Soup at Hand, as a substitute for the lunch.
However, they could eat as much as they wished at other meals or have snacks.
For
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