If you’re stressed out, eat a peach — or maybe some celery.

New research shows eating more fruits and vegetables is associated with reduced stress levels. In a study involving more than 8,000 people, Australian researchers used a scientifically valid questionnaire to gauge the participants’ perceived stress levels. They also answered detailed questionnaires about their eating habits, which were further tracked by measuring fruit and vegetable biomarkers in the blood.

Those who consumed about a pound a day of fruits and vegetables reported a 10% decrease in stress when compared with those who ate about half that amount.

It is still unclear exactly how eating more fruit and vegetables influence stress levels. But the researchers believe the vitamins, minerals and other nutrients in fruits and vegetables may be stress reducers.

Previous studies have showed a similar association in young adults with a balanced diet. The latest findings are the first time such results have been shown in a broader age group.

The U.S. Department of Agriculture recommends two cups of fruit and two-and-one half cups of vegetables a day for people on a 2,000-calorie diet. The World Health Organization suggests eating about five portions of fruits and non-starchy vegetables daily.

Next, the researchers plan to further investigate how diet — especially eating more fruit and vegetables — influences mental health. They hope that can better inform health policy and dietary guidelines.

With these findings in mind, consider having some more vegetables. It might lower your stress, keeping you as cool as a cucumber.