Kyoto University researchers find fat consumption order affects blood sugar

An international research team, including scientists from Kyoto University, has identified the biological mechanisms behind how meal sequencing affects blood glucose levels. The study, published in the journal Diabetes, found that administering olive oil before carbohydrates in mice slowed gastric emptying and reduced early post-meal blood sugar spikes.

The research suggests that consuming fat before glucose triggers a coordinated response involving gut and pancreatic hormones, specifically GLP-1 and glucagon, alongside vagal nerve pathways. This process delays the delivery of glucose to the small intestine, where it is absorbed into the bloodstream.

While previous human studies have indicated that eating vegetables, protein, or fat before carbohydrates can moderate glucose rises, the underlying biological interactions remained unclear. Researchers noted that meal sequencing offers a practical dietary strategy for diabetes management because it focuses on the order of consumption rather than requiring the elimination of specific food groups.