Chamomile With flowers that resemble small daisies, chamomile is another medicinal plant that’s thought to have anti-anxiety properties. Most people know it because it’s a popular tea flavor (one reviewTrusted Source says that over 1 million cups per day are consumed around the world), but it can also be ingested through liquids, capsules, or tablets. The calming powers of chamomile have been frequently studied, including a 2009 studyTrusted Source that states chamomile is superior to taking a placebo when treating generalized anxiety disorder. One recent study confirmed it’s safe for long-term use, and another recent studyTrusted Source looked beyond its use for anxiety and confirmed that it also shows potential in anticancer treatments.