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Teens and young adults ate more and snacked more after two weeks on ultra-processed foods, a study found.
A November 2025 study in Obesity found that teens and young adults aged 18 to 21 consumed more calories and snacked more frequently—even when not hungry—after just two weeks on a diet high in ultra-processed foods, compared to a diet of unprocessed foods.
The Virginia Tech research involved 27 participants aged 18 to 25, with diets matched for nutrients and energy.
The effect was not seen in older participants.
Ultra-processed foods, which make up to 65% of daily calories for Americans aged 15 to 24, include packaged snacks, sugary cereals, and ready-to-eat meals.
Researchers say the findings suggest these foods may disrupt hunger signals and contribute to long-term weight gain, calling for larger, real-world studies.
Un estudio descubrió que los adolescentes y los adultos jóvenes comieron más y tomaron más bocadillos después de dos semanas de alimentos ultraprocesados.