Did you ever wonder why dieters could seem so snarly? New research says that hard-to-notice blood sugar imbalances can be partly to blame for irritability and irrational frustration—including domestic quarrels.
Here’s the theory: Self-control takes energy to maintain, and that energy comes from burning glucose. If this energy supply is low, regulating emotions and unwelcome impulses becomes more difficult.
A team of scientists decided to test the relationship between blood sugar levels and domestic quarreling. They handed out voodoo dolls and glucometers to 107 couples, who had been married for an average of 12 years. Every evening for three weeks, according to their marital frustration, each partner pricked a doll that symbolized their spouse and measured their blood sugar level.
The results, posted online by the Proceedings of the National Academy of Scientists, showed that the lower a study participant’s blood sugar, the more pins they stuck in the doll.
Does the link between irritability and hunger seem intuitive to you? It does to me, too. But now you know it’s a scientific fact—there’s a reason you might reach for a cookie after a fight with your significant other besides that you need the comfort. You probably also need the glucose.