Trial · Zick et al., BMC Complementary and Alternative Medicine(2011)
Preliminary examination of the efficacy and safety of a standardized chamomile extract for chronic primary insomnia(opens in a new tab)
- Findings and study population
- Thirty-four adults aged 18–65 received extract, 270 mg twice daily for 28 days, or placebo. No significant between-group difference was detected in primary sleep efficiency or total sleep time; effect sizes for other outcomes do not establish efficacy.
- Limitations and differences from this claim
- Small pilot, not a tea trial; excluded pregnancy or breastfeeding, related allergies, and warfarin or hypnotic use. University and MICHR/NIH support; explicitly no MediHerb funding or product donation.
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