Romantic Partners May Help Stabilize Blood Sugar Levels After Meals, Study Suggests

The presence of a romantic partner may play a role in stabilizing blood sugar levels after eating, according to new research. A study suggests that sharing a meal with a loved one can help soften the impact of sugar highs and subsequent energy crashes.

Consuming simple carbohydrates, such as those found in white rice or bread, causes the body to break them down rapidly, leading to a spike in blood sugar. This can result in a temporary energy surge followed by fatigue, cravings, thirst, and headaches. Over time, such spikes can affect mental health, energy levels, mood, and sleep, and may increase the risk of chronic diseases like diabetes.

New research from The Hebrew University of Jerusalem, published in Science Advances, involved 54 couples who ate 50 grams of white bread on two separate occasions: once alone and once together. Researchers measured participants' blood sugar levels two hours after consumption. The findings indicated that when partners were present, the total glucose response was, on average, 24% lower compared to when individuals ate alone.

Beyond mitigating the spike, eating with a partner also helped blood sugar return to normal levels more quickly. Researchers theorize that this effect could be related to "social buffering," a phenomenon where the presence of a loved one can reduce stress responses, and stress is known to exacerbate blood sugar spikes.

Broader Effects of Social Support

The study also explored the impact of a loved one's presence on other physiological responses. In one experiment, couples were exposed to a cold room (54°F) for five minutes before moving to a warmer environment (77°F) to recover. Participants experienced less of a drop in skin temperature and returned to their baseline temperature more quickly when their romantic partner was present.

In another test involving mild electric shocks, researchers measured physiological stress through sweat. The stress response was found to be smaller and shorter-lived when partners were together compared to when they were separated.

Furthermore, the study observed the calming effect on infants. Babies who had their mothers present to hold and talk to them calmed down more quickly after hearing a startling sound than those whose mothers were in a separate room.

Homeostasis and Individual Variation

These findings suggest that the presence of a loved one can aid the body in recovering from stressful events and help maintain homeostasis, the body's ability to regulate internal conditions such as temperature and blood sugar.

However, the researchers noted significant individual variation in how partners affected these regulatory processes. While many couples showed improved regulation with their partner present, some experienced neutral effects, and a few even showed worse regulation. Future research is suggested to explore the reasons behind these differences in relationship dynamics and their impact on physiological regulation.