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What Causes What
Lifestyle & environment

Chamomile

cups/day

Daily chamomile tea, usually for about two weeks. It is the tea, not a theanine drink or a valerian mix.

Trials pour a daily chamomile tea for about two weeks and score sleep. A chamomile-plus-theanine drink aimed at menstrual pain, or a multivitamin, is a different mix.

Also called Matricaria chamomilla, chamomile tea, German chamomile.

Connected relationships

MECHANISM+ INCREASES

Randomized trial · Contested

Chamomile→Sleep duration and regularity

Higher Chamomile increases Sleep duration and regularity.

Chang 2016 found that two weeks of chamomile tea lowered a physical-symptoms sleep-inefficiency score versus usual care in 80 Taiwanese postnatal women with poor sleep (P=0.015). The difference was gone two weeks after the tea stopped. There was no placebo drink.

Read the full evidence

Sources