Benefits of Chamomile : Chamomile tea has long been known for its ability to promote calmness. Research shows that chamomile is a mild tranquilizer. These effects may be due to the activity of the flavonoid apigenin, which binds to specific receptors in the brain. One study shows that chamomile oil may help to reduce stress. Chamomile essential oil aromatherapy is also used by many to promote sleep and reduce stress. It is also believed that chamomile can help to improve cardiovascular conditions, stimulate the immune system and guard against cancer.