Can Tart Cherry Juice Help You Sleep Better Naturally?
Yes, at least in healthy adults. In a randomised, double blind, placebo controlled crossover trial, 20 healthy volunteers drank a tart cherry juice concentrate or a placebo for 7 days each. The cherry juice raised total melatonin content and produced significant increases in time in bed, total sleep time and sleep efficiency compared with placebo. Tart Montmorency cherries have been reported to contain high levels of phytochemicals including melatonin, the molecule that regulates the sleep wake cycle, and this trial was designed to test whether drinking a concentrate made from them would raise melatonin and improve sleep.
Dr. Kumar’s Take
I like this study because it tests a food the way you would test a drug: randomised, double blind, placebo controlled, with each person serving as their own control. That design matters when the outcome is sleep, where expectation alone can move the needle.
The result is modest and honest. Seven days of a tart cherry juice concentrate raised total melatonin output and increased total sleep time and sleep efficiency in healthy men and women. The timing of the melatonin rhythm did not shift, which tells me this is more about adding a little exogenous melatonin than about resetting anyone’s body clock.
Two things keep my enthusiasm in proportion. This was 20 healthy adults, not patients with insomnia, so I would not present it as a treatment for a sleep disorder. And the sleep gains were measured over a single week. If you want to try it, I think it is a low risk experiment, but treat it as a small nudge to sleep duration and efficiency rather than a replacement for the basics: consistent timing, a dark cool room, and light exposure in the morning.
Key Findings
Total melatonin content was significantly elevated (p < 0.05) in the cherry juice group. No difference appeared between the baseline and placebo trials, so the rise tracked the juice rather than the routine of the study.
Sleep improved. Time in bed, total sleep time and sleep efficiency all increased significantly (p < 0.05) with cherry juice supplementation.
Cosinor analysis showed no difference in the timing of the melatonin circadian rhythm, with a trend toward a higher mesor and amplitude.
The authors’ reading of this is that the concentrate delivers an increase in exogenous melatonin that improves sleep duration and quality in healthy men and women, and that it might be of benefit in managing disturbed sleep.
Brief Summary
This randomised, double blind, placebo controlled crossover study examined the effect of a tart cherry juice concentrate on melatonin levels and sleep quality in healthy adults. Twenty volunteers consumed either the concentrate or a placebo for 7 days. Sleep was recorded by actigraphy and by subjective sleep questionnaires. Sequential urine samples were collected over 48 hours and urinary 6-sulfatoxymelatonin, the major metabolite of melatonin, was measured, with cosinor analysis used to determine the mesor, acrophase and amplitude of the melatonin rhythm. Total urinary melatonin content was also determined over the sampled period.
Study Design
Each participant completed both the cherry juice and the placebo condition, so every person acted as their own control and neither the volunteers nor the investigators knew which drink was which. Supplementation ran for 7 days in each condition.
Sleep was captured two ways: actigraphy for objective measures, and subjective sleep questionnaires. The biochemistry came from sequential urine samples collected over 48 hours, analysed for 6-sulfatoxymelatonin, with cosinor analysis applied to characterise the melatonin circadian rhythm. Differences between trials were tested with a repeated measures ANOVA.
Results You Can Use
Seven days of a tart cherry juice concentrate raised total melatonin content and significantly increased time in bed, total sleep time and sleep efficiency in healthy adults, compared with placebo.
The mechanism the data point to is added melatonin from the drink itself. Urinary 6-sulfatoxymelatonin confirmed that the melatonin was absorbed and metabolised, and the placebo trial did not differ from baseline.
The effect was on how much sleep people got and how efficiently they slept, not on when their melatonin rhythm peaked. The acrophase did not move, with only a trend toward a higher mesor and amplitude.
This was tested in healthy men and women. The authors suggest it might be of benefit in managing disturbed sleep, but that is a hypothesis their trial raises rather than one it settles.
Why This Matters For Health And Performance
Total sleep time and sleep efficiency are the two numbers most people are trying to move, and they are the two this trial moved. That makes tart cherry juice concentrate an appealing option for anyone who would rather adjust something in their diet than start a supplement or a medication.
It also puts a food source of melatonin on firmer ground. The melatonin in the concentrate was absorbed and showed up in urine as 6-sulfatoxymelatonin, so this is not just a plausible story about phytochemicals, it is a measured increase in urinary melatonin with a matching change in sleep.
How to Apply These Findings in Daily Life
- Use the form that was tested: the trial used a tart cherry juice concentrate, not fresh fruit or a cherry flavoured drink
- Give it a week: supplementation ran for 7 days before the sleep differences were measured
- Judge it on the right outcomes: total sleep time and sleep efficiency were what improved, so track those rather than how a single night felt
- Track it objectively: sleep in this study was measured by actigraphy, and a wearable or a consistent sleep diary will tell you more than memory will
- Keep expectations calibrated: this was tested in healthy adults, so if you have a diagnosed sleep disorder, talk to your doctor rather than treating juice as the intervention
Limitations To Keep In Mind
The trial enrolled 20 volunteers, which is a small sample even for a crossover design. Participants were healthy men and women, so the findings do not transfer automatically to people with insomnia or other sleep disorders. Supplementation ran for 7 days, so nothing here speaks to what happens over months of use. The study tested one tart cherry juice concentrate, and melatonin content can differ between products. And the melatonin rhythm itself did not shift in timing, so this is best understood as adding melatonin rather than correcting a misaligned clock.
Related Studies And Internal Links
- Magnesium Supplementation Improves Sleep Quality in Elderly with Insomnia
- The Pineal Gland: Your Body’s Melatonin Factory and Sleep Control Center
- Glycine Improves Subjective Sleep Quality in Human Volunteers
- Room Light Before Bedtime Suppresses Melatonin and Shortens Sleep Duration
- How to Sleep Better: Science Daily Playbook
FAQs
Does tart cherry juice actually raise melatonin levels?
Yes. Total melatonin content was significantly elevated in the cherry juice group, measured as urinary 6-sulfatoxymelatonin across sequential urine samples collected over 48 hours. The placebo trial did not differ from baseline.
How long did people drink it before sleep improved?
Seven days. That was the length of each supplementation period in the crossover design, and the increases in time in bed, total sleep time and sleep efficiency were measured against placebo over that window.
Does this apply to people with insomnia?
The participants were healthy men and women, so the results describe what happens in healthy sleepers. The authors suggest the concentrate might be of benefit in managing disturbed sleep, but that group was not studied here.
Conclusion
Seven days of a tart cherry juice concentrate raised total melatonin content and significantly increased time in bed, total sleep time and sleep efficiency in 20 healthy adults, without shifting the timing of the melatonin rhythm. It is a small, well controlled trial in healthy sleepers, and I read it as reasonable support for a food based way to add a little melatonin and pick up some extra sleep, not as a treatment for a sleep disorder.
