A recent study has found a link between chronic stress and a significant increase in weight without individuals being aware of it. Researchers at University College London examined cortisol levels, a stress hormone, found in hair strands from over 2,500 British men and women over the age of 54. Previous studies had measured cortisol levels in blood, saliva, and urine, which are considered less precise and stable methods for assessing this hormone's levels in the body.
In this study, researchers collected hair samples as close to the scalp as possible, allowing them to analyze approximately two months' worth of cortisol levels. They also measured participants' weight, body mass index (BMI), and waist circumference. According to the researchers, those with higher levels of cortisol in their hair tended to weigh more, have larger waist circumferences, and a higher BMI.
Sarah Jackson, the lead researcher, stated, "These findings provide strong and consistent evidence that chronic stress is associated with higher levels of obesity. In fact, gaining weight not only makes you look less attractive, but the accumulation of excess fat around the abdomen is considered a risk factor for heart disease, diabetes, and premature death."
Furthermore, some pointed out that this study has limitations in two main ways: all participants were Caucasian and older, suggesting a more representative and diverse sample might reveal different results. Nevertheless, this study paves the way for an objective new method to examine the effects of high stress and anxiety on the body and indicates that high cortisol levels should be a focal point for scientists looking to address obesity.
