Taking herbal supplements may benefit people with anxiety disorders, according to findings published in Nutrition Journal.

Recently, a team of researchers analyzed the results of 24 different trials, and of the studies, 21 included participants who reported positive results when taking the supplements. Furthermore, these individuals didn’t experience any serious side effects.

The investigators concluded that the capsules that were most effective against these health problems contained passion flower or kava extract as well as L-lysine and L-arginine, which are both amino acids. While the supplements alleviated some anxiety symptoms, the team suggests that further studies will be needed to determine the proper daily dosage, and the most effective amount against each disorder.

“Our review and summary of the literature on herbal remedies and dietary supplements for anxiety should aid mental health practitioners in advising their patients and provide insight for future research in this field,” Shaheen Lakhan, co-author of the research.

In 2006, an estimated 11.3 percent of people in the U.S. were diagnosed with anxiety disorders, according to the Centers for Disease Control and Prevention.