The Short Version
Clinical trial evidence does support chamomile's anxiety-reducing effects, though the claim overstates the strength and scope of that evidence. A peer-reviewed, placebo-controlled trial found statistically significant reductions in anxiety scores, and a systematic review of 10 trials found 9 reporting positive results. However, most studies used standardized chamomile extract — not brewed tea — and effects are characterized as modest, primarily in mild-to-moderate generalized anxiety disorder. The claim is directionally accurate but lacks important qualifiers.