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Chamomile

If you have a jittery moment, a cuppa chamomile tea might help calm you down. Some compounds in chamomile (Matricaria recutita) bind to the same brain receptors as drugs like Valium.

You can also take it as a supplement, typically standardized to contain 1.2% apigenin (an active ingredient), along with dried chamomile flowers. In one study at the University of Pennsylvania Medical Center, in Philadelphia, patients with generalized anxiety disorder (GAD) who took chamomile supplements for eight weeks had a significant decrease in anxiety symptoms compared to patients taking placebo.

Next: L-theanine (or green tea)