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Social Proximity Lowers Post-Meal Glucose Spikes, New Study Finds
By Drooid · · How we work
New Study Shows Social Interaction Improves Metabolic Regulation
Researchers at the Hebrew University of Jerusalem (HUJI) and Sheba Medical Center at Tel Hashomer reported that eating with another person reduced blood-glucose spikes and accelerated recovery after a standardized carbohydrate meal. Shir Atzil, PhD student Monia Masalha, and Dr. Shai Fuchs, with assistance from six laboratory students.
Study Design and Key Findings
Participants consumed 50 g of carbohydrates (102 g of white-wheat bread) while their glucose levels were monitored for 120 minutes. In the “social” condition, a companion was present; in the “alone” condition, participants ate without a partner. The average glucose increase was 23 % lower when a companion was present. Electrodes recorded physiological data, but participants did not need to sit together or touch each other; touch was not a significant factor. Across preregistered experiments, social proximity also improved temperature regulation during cold exposure and reduced stress responses in both adults and infants. The researchers found no systematic differences by gender, age, body-mass index, metabolic health, or amount of physical contact. Variation among individuals was noted, but the cause of this variation remains unidentified.
Biological Implications and Expert Interpretation
Atzil described the findings as evidence that “human physiology is inherently social,” suggesting that the brain’s role in maintaining bodily functions may be enhanced by close interpersonal bonds. The study’s funding came from a European Research Council Starting Grant awarded to Atzil. She emphasized that social closeness is not a substitute for medical care, nutrition, or exercise, but it may represent an overlooked factor influencing metabolic health. Future research plans include testing siblings, strangers, and individuals with pre-diabetes or diabetes, as well as exploring implications for older adults who eat alone.
Official Statements & Responses
Prof. Atzil told *The Jerusalem Post* that the discovery challenges the traditional view of the body as an isolated regulatory system. The team cautioned that the study is preliminary and that further work is needed to determine practical applications in clinical or caregiving settings.
Verbatim Quotes
- “We used to think of the body as an isolated system that regulates itself,” — Prof. Shir Atzil
- “Blood sugar regulation is not just about what we eat, but who we eat with,” — Prof. Shir Atzil