Does Chamomile Tea Actually Improve Sleep Quality in Older Adults?
The study behind this headline did not test tea. It tested 400 mg oral chamomile capsules, taken twice daily after lunch and after dinner for 4 weeks, in elderly residents of nursing homes in Isfahan, Iran. It was a quasi-experimental clinical trial, not a randomized double-blind design, and the control group received no intervention at all rather than a placebo beverage. Before the intervention, mean sleep quality scores in the two groups did not differ significantly (P > 0.05). After 4 weeks, the difference between the chamomile group and the control group on the Pittsburgh Sleep Quality Index was significant (P < 0.001). The authors concluded that oral chamomile extract has sedative properties for sleep quality in hospitalized elderly patients in nursing homes.
Dr. Kumar’s Take
I want to be careful about what this trial can and cannot tell me. It is a small, quasi-experimental study in Iranian nursing home residents, and the control group got nothing rather than a placebo. That design cannot separate a pharmacologic effect of chamomile from the effect of being handed a capsule twice a day and having someone ask about your sleep. The Pittsburgh Sleep Quality Index is a self-report questionnaire, so expectation moves the score.
What the trial does support is modest and still useful: 400 mg of oral chamomile extract twice daily for 4 weeks was associated with significantly better self-reported sleep quality than no intervention in this population, and the authors report no side effect concerns for chamomile in the clinical literature they cite. In older adults, that matters, because the alternative many of them reach for is a sedative-hypnotic. Those drugs suppress REM sleep, and long-term use carries dependence and tolerance, with withdrawal symptoms that can exceed the original complaint. Against that backdrop, a low-risk herbal option is worth a conversation with a patient’s physician, particularly since older adults are often on several other medications.
I would not extrapolate this to a cup of tea before bed. The dose form, the dose, and the timing in this trial were all different from how most people drink chamomile.
Key Findings
The study enrolled 77 elderly people living in selected nursing homes in Isfahan in 2014. Participants were 60 years or older. Eighty people were selected by convenience sampling to allow for loss, against a calculated requirement of 70. They were divided into an intervention group and a control group.
The intervention group received 400 mg oral chamomile capsules twice daily, after lunch and after dinner, for 4 weeks. The control group received no intervention.
Sleep quality was measured with the Pittsburgh Sleep Quality Index before and after the intervention. At baseline, mean sleep quality scores did not differ significantly between the two groups (P > 0.05). After the 4 weeks, the difference between groups was significant (P < 0.001).
Brief Summary
This quasi-experimental clinical trial examined the effect of oral Matricaria chamomilla extract on sleep quality in elderly residents of nursing homes in Isfahan. Participants were assigned to an intervention group that took 400 mg chamomile capsules twice daily for 4 weeks or to a control group that received no intervention. Sleep quality was assessed before and after with the Pittsburgh Sleep Quality Index.
Study Design
The design was a quasi-experimental clinical trial with a pretest and posttest in both a control and an intervention group, conducted in 2014. The study population was people aged 60 years or older living in selected nursing homes in Isfahan. Inclusion criteria included willingness to participate with informed consent, age of 60 years or more, and mental health. Participants were selected through random continuous sampling and divided into the two groups.
The intervention was 400 mg oral chamomile capsules twice daily, after lunch and after dinner, for 4 weeks. The control group received no intervention. Data were analyzed with descriptive statistics, paired and independent t-tests, one-way analysis of variance, and linear regression, using SPSS version 17.
Results You Can Use
Oral chamomile extract at 400 mg twice daily for 4 weeks produced significantly better sleep quality scores than no intervention in elderly nursing home residents. The measured outcome was the Pittsburgh Sleep Quality Index, a self-report instrument, and the between-group difference after the intervention reached P < 0.001.
The dose form matters. This was a capsule taken after lunch and after dinner, not a bedtime tea, so the results do not translate directly to a mug of chamomile before sleep.
The authors note that clinical trial use of chamomile in other conditions has not reported side effects, and their conclusion is that oral chamomile extract can be used in similar cases and in nursing care.
Why This Matters For Health And Performance
Sleep problems are common in older adults. The authors cite figures that only 12% of aged people report no complaint of sleep problems and more than 57% report sleep problems, and that poor quality sleep ranks third among the problems of older people after headache and digestive disorders. Insufficient sleep in this group is associated with fatigue, frustration, cognitive disorders, poor physical function, and increased mortality, and many older people attribute these symptoms to age and never seek treatment.
The default response is often a sleeping pill. The authors report that 39% of soporific drug use is by people over 60, that these drugs reduce rapid eye movement sleep that is important for mental function and stress relief, and that long-term use of some of them brings dependence and tolerance, with withdrawal symptoms that can be worse than the original complaint. A well-tolerated alternative with trial evidence behind it is worth having in the conversation.
How to Apply These Findings in Daily Life
- Match the tested form: The trial used 400 mg oral chamomile capsules, not tea. If you want to follow the protocol, follow the capsule and the dose.
- Match the tested timing: Twice daily, after lunch and after dinner.
- Give it the full period: The trial ran for 4 weeks before measuring the outcome.
- Talk to your physician first: Especially if you are over 60 and taking other medications.
- Do not treat it as a substitute for evaluation: Persistent poor sleep in an older adult deserves a proper workup, not just a supplement.
Limitations To Keep In Mind
This was a quasi-experimental trial, not a randomized double-blind study, and the control group received no intervention rather than a placebo, so expectation effects cannot be separated from any drug effect. The outcome was self-reported sleep quality on a questionnaire rather than an objective sleep measure. The participants were elderly people living in nursing homes in one Iranian city, so the results may not carry over to older adults living independently or to younger people. The intervention ran for 4 weeks, and nothing here speaks to longer use or to what happens after stopping.
Related Studies And Internal Links
- Chamomile Extract Effects on Sleep Quality in Elderly
- Saffron Extract Improves Sleep Quality: Clinical Trial
- Tart Cherry Juice Improves Sleep in Older Adults
- Mindfulness Meditation Improves Sleep Quality in Older Adults
- How to Sleep Better: Science Daily Playbook
FAQs
How much chamomile did the study use?
The intervention group took 400 mg oral chamomile capsules twice daily for 4 weeks. The study did not test chamomile tea.
When were the capsules taken?
After lunch and after dinner.
Are there any side effects from chamomile?
The authors state that clinical trial use of chamomile for other conditions has not reported side effects. Check with your physician before starting any supplement, particularly if you take other medications.
Conclusion
In elderly nursing home residents in Isfahan, 400 mg of oral chamomile extract taken twice daily for 4 weeks produced significantly better Pittsburgh Sleep Quality Index scores than no intervention (P < 0.001), with no significant difference between the groups at baseline. The authors concluded that oral chamomile extract has sedative properties for sleep quality in this population and can be used in similar cases and in nursing care. The design was quasi-experimental with an untreated control group, so I read the result as promising rather than definitive.
