Researchers recruited 55 adults who were overweight or living with obesity, most of whom already consumed a high percentage of ultraprocessed foods. The team provided every meal and snack for two separate 8-week periods: one with mostly minimally processed foods (like fruits, oats, chicken, and vegetables), and one with mostly ultraprocessed, but still nutritionally sound, options (like high-fiber cereals, frozen lasagna, and flavored yogurt).
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