US adults have been eating more highly processed junk food over the past two decades, according to a national survey.
Filippa Juul at New York University and her colleagues analysed data from a yearly survey that has been carried out since 2001. Each year, the survey asks a nationally representative group of 5000 US adults to recall what they had eaten in the past 24 hours.
The team categorised foods into four groups based on the level of processing that …
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