Powerhouse ingredient L-theanine might help treat your anxiety and help you get a better night’s rest, according to MindBodyGreen.

According to the Anxiety and Depression Association, anxiety disorders are the most common mental illness in the United States, affecting around 40 million adults. The effects of anxiety spill over into every crevice of life, and perhaps one of the hardest consequences of anxiety is how it messes with sleep. Treatment of anxiety disorders—or at least symptom-management approaches—are for the most part keeping up with the increasing incidence, but there is still so much undiscovered terrain in the human brain. Mental imbalances are complex, multifactorial, and personal, and the way they’re treated and managed should reflect this complexity.

As a nutritionist trained in functional medicine and systems biology, I’m always looking out for natural and noninvasive things—foods, supplements, habits, behaviors, and beliefs—that can help bring bodies back into balance.