There’s very little information on chamomile’s effect on insomnia. A 2019 review of six small studies included only one study on insomnia. That one study found that chamomile had no benefit for insomnia. The same 2019 review looked at five studies on chamomile’s effect in non-insomnia populations. The review concluded that chamomile might help improve the individual component of sleep quality over a 4-week period in people without insomnia.