# Metabolic impact of ultra-processed foods > Live situation record from CLSTR: https://clstr.news/situations/metabolic-impact-of-ultra-processed-foods > Updated: 2026-10-08T11:18:36.000Z. Sources: 4. Developments: 2. Research into nutritional science has increasingly focused on the metabolic impact of ultra-processed foods. An initial dietary experiment involving monozygotic twins demonstrated that consuming ultra-processed foods led to weight gain, increased blood sugar, and higher fat levels, whereas consuming minimally processed, home-cooked meals resulted in weight loss and stable glucose and cholesterol levels. Subsequent scientific investigations, including a study published in Nature Metabolism, have reinforced these findings. Researchers observed that ultra-processed foods trigger a significantly stronger insulin response and cause blood sugar levels to remain elevated for longer periods compared to natural foods, even when macronutrient content is identical. This suggests that the method of food processing, rather than just the ratio of fats, sugars, and proteins, is a critical factor in metabolic health. ## Timeline ### 2026-10-08: Scientific studies examine blood type diets and ultra-processed food metabolism New research questions the efficacy of blood type diets and demonstrates that ultra-processed foods trigger stronger insulin responses than natural foods, even with identical macronutrient levels. 2 sources. https://clstr.news/cluster/scientific-studies-examine-blood-type-diets-and-ultra-processed-food-metabolism ### 2026-09-18: Dietary experiment shows impact of ultra-processed foods A study of identical twins reveals that consuming ultra-processed foods leads to weight gain and poor blood markers, even when calories and nutrients are matched with a fresh-food diet. 2 sources. https://clstr.news/cluster/dietary-experiment-shows-impact-of-ultra-processed-foods --- Cite as: Metabolic impact of ultra-processed foods. CLSTR, https://clstr.news/situations/metabolic-impact-of-ultra-processed-foods