Scientists recently published a report in the journal JAMA Internal Medicine indicating that normal-weight people who eat less feel better than those who eat more.

In this two-year study of calorie restriction, two-thirds of the 218 participants were able to reduce their caloric intake by 25 percent.

On average, they weighed 10 percent less and experienced improved mood and less feelings of tension after two years, while the control group experienced more symptoms of depression.

It’s not clear why these individuals felt better, but it could be due to physiological changes resulting from weight loss.

For example, after one year in the study, the calorie-restricted men had no change in testosterone levels.

But testosterone declined in the men who ate normally. Low testosterone can lead to feelings of depression.