Ultra‑processed foods risk
- A new systematic review linked higher ultra‑processed food intake to greater odds of adolescent overweight and obesity. - The analysis pooled 23 studies covering about 155,000 adolescents across multiple countries. - Authors say the multi-study evidence strengthens the association between processed diets and youth weight risk. (quicknews.co.za)
Ultra-processed foods are industrial formulations — think packaged snacks, sugary drinks, instant noodles and reconstituted meat products — and a new review says teens who eat more of them are more likely to be overweight or obese. (journals.plos.org) The paper, published April 15 in *PLOS One*, pooled 23 observational studies covering about 155,000 adolescents and found higher ultra-processed food intake was linked to 63% greater odds of overweight or obesity. (pubmed.ncbi.nlm.nih.gov) The researchers said the studies were conducted across 16 countries between 2008 and 2025, and the positive association appeared in Africa, Asia, Europe, North America and South America. (eurekalert.org) The review looked at adolescents ages 10 through 19, an age range when excess weight is already tied to higher rates of prediabetes, high cholesterol, hypertension and metabolic syndrome later in youth and adulthood. (eurekalert.org) In the United States, 22.9% of adolescents ages 12 to 19 had obesity in August 2021 through August 2023, according to the Centers for Disease Control and Prevention. (cdc.gov) This review does not prove that ultra-processed foods cause obesity, because it combined observational studies rather than randomized trials. The authors also reported differences across studies in how diets and weight outcomes were measured. (pubmed.ncbi.nlm.nih.gov; eurekalert.org) That caution matters because an earlier 2024 systematic review of children and adolescents found the evidence was heterogeneous and often inconclusive, with several cohort studies showing mixed results and many cross-sectional studies showing no association. (pubmed.ncbi.nlm.nih.gov) The newer meta-analysis argues the evidence base has grown enough to estimate a pooled effect, and its subgroup analysis found the strongest association in studies published in 2024 and 2025, with an odds ratio of 2.09. (eurekalert.org) The World Health Organization is now developing a guideline on ultra-processed food consumption, a sign that the issue has moved from academic debate into formal nutrition policy work. (who.int) For parents and schools, the paper adds one more large multi-country dataset to a familiar pattern: the more teens’ diets shift toward heavily manufactured foods, the higher their measured odds of excess weight. (journals.plos.org)
