How Much Melatonin in Cherries and Can It Help Sleep?

Cherries do contain melatonin, but the amounts are remarkably small compared to what you would find in even the lowest-dose supplement. The highest concentrations measured in sweet cherry cultivars top out around 22 nanograms per 100 grams of fruit, which is thousands of times less than the 0.5 to 5 milligrams typically recommended for sleep. Yet several small clinical trials have found that tart cherry juice modestly improves certain sleep measures, and the reason appears to have less to do with melatonin itself than with other compounds in cherries that affect how your body handles tryptophan and inflammation.

How Much Melatonin Is in Cherries

Researchers have measured melatonin in several sweet cherry varieties using sensitive laboratory techniques. Among eight cultivars tested, the highest concentration was found in Burlat cherries at about 22 nanograms per 100 grams of fresh fruit. Other cultivars contained less.¹ A broader review of food melatonin levels that pooled data from the literature assigned strawberries and cherries a median value of roughly 3.8 nanograms per gram, with individual measurements ranging from as low as 0.006 to as high as 15 nanograms per gram.²

To put those numbers in perspective, a standard melatonin supplement tablet contains 0.5 to 5 milligrams. One milligram equals one million nanograms. So even if you ate a generous bowl of the most melatonin-rich cherries, you would be getting a dose on the order of a few hundred nanograms at most, still thousands of times below what is in a typical supplement. One research team calculated that the amount of melatonin delivered in a dose of tart cherry juice used in their sleep study was about 0.135 micrograms, while the therapeutic range for melatonin supplementation starts at 500 micrograms and goes up to 5,000 micrograms.³ That gap, roughly six-fold to sixty-fold below the minimum effective supplement dose, is why researchers have looked beyond melatonin itself to explain any sleep-related effects cherries might have.

Why Cherries Might Help Sleep Despite So Little Melatonin

If the melatonin dose from cherry juice is too small to account for sleep improvements on its own, what else could be going on? The leading hypothesis centers on tryptophan, the amino acid your body uses to make both serotonin and melatonin. Cherries contain tryptophan, but so do many foods. What makes tart cherries potentially different is the presence of specific polyphenols, particularly a compound called procyanidin B-2, that appear to slow the breakdown of tryptophan through an enzyme pathway involving indoleamine 2,3-dioxygenase (IDO). In laboratory experiments, procyanidin B-2 at certain concentrations inhibited this enzyme, and in a pilot clinical trial, people who drank tart cherry juice showed a reduced ratio of tryptophan breakdown products, suggesting more tryptophan was available for conversion into sleep-promoting compounds.⁴

The same study found that a marker of inflammation called PGE-2 dropped in a dose-dependent manner when people drank cherry juice. Inflammation and poor sleep have a well-documented two-way relationship: inflammation disrupts sleep, and poor sleep drives more inflammation. Tart cherries are rich in anthocyanins and other anti-inflammatory polyphenols, and those compounds may be doing more heavy lifting than the melatonin. In other words, cherry juice is not functioning like a tiny melatonin pill. It may work through a combination of keeping tryptophan from being diverted away from melatonin production and tamping down inflammation that interferes with sleep.

What the Sleep Studies Actually Found

A systematic review examining the effect of tart cherry on sleep quality found that three studies reported significant improvements in measures like sleep duration, sleep efficiency, or the time it took to fall asleep.⁵ That sounds promising, but a few things are worth knowing. The trials so far have been small, often enrolling fewer than 20 participants, and they vary in how they measured sleep, who participated, and how long people drank cherry juice.

One early pilot study in older adults with insomnia found that a tart cherry juice blend reduced the severity of insomnia by lowering the number of minutes people spent awake after initially falling asleep. However, when compared against placebo, the juice did not significantly improve total sleep time, how quickly people fell asleep, or overall sleep efficiency. The researchers described the effects as modest and noted that the benefits were comparable to what has been seen with valerian and some melatonin studies, but considerably less than what you would get from prescription sleep medication or cognitive-behavioral therapy for insomnia.⁶

A separate trial, also in older adults with insomnia, measured sleep using polysomnography, which is considered the gold standard for sleep measurement. That study reported an increase in total sleep time of about 85 minutes compared to placebo.⁷ Eighty-five minutes is a large effect that would be meaningful to anyone losing sleep, but it came from a single small trial, and the magnitude has not been consistently replicated across other studies. This is the kind of result that makes scientists cautiously interested but not ready to make strong recommendations.

Another trial in healthy young adults confirmed that drinking tart cherry juice raised urinary melatonin levels compared to placebo, providing direct evidence that some of the melatonin in cherry juice does make it into the body and through the metabolic pathway.⁸ Whether that small uptick alone is enough to shift sleep patterns, or whether it works in concert with the anti-inflammatory and tryptophan-sparing effects described earlier, remains an open question.

Sweet Cherries Versus Tart Cherries

Almost all of the sleep research has been done with tart cherries, specifically the Montmorency variety, which is the dominant tart cherry grown in North America. Tart cherries have a higher concentration of anthocyanins and phenolic compounds compared to most sweet cherry varieties, and those polyphenols appear to be central to the proposed sleep mechanism. Sweet cherries are what you typically buy fresh at the grocery store during summer (varieties like Bing, Rainier, and Burlat), and while they do contain melatonin, the research on sleep has not focused on them.

The melatonin measurements from sweet cherries discussed earlier came from a study of fresh fruit, where concentrations varied widely across eight cultivars.¹ Tart cherry juice used in clinical trials is a concentrated product, which increases the dose of all cherry compounds, melatonin included. If you are eating a handful of fresh sweet cherries before bed and hoping for sleep benefits, the evidence does not really speak to that scenario. The studies used tart cherry juice concentrate, often diluted into a drink taken twice daily for one to two weeks.

Processing and What Survives Into Juice

A reasonable question is whether melatonin in fresh cherries survives juicing, pasteurization, and storage. One study attempted to detect melatonin in various cherry products using nuclear magnetic resonance spectroscopy and found none above the detection limit.⁹ This could mean that processing degrades the melatonin, or simply that the amounts are so tiny they fall below what that particular method can pick up. The clinical trials that did find elevated melatonin metabolites in urine after participants drank tart cherry juice suggest at least some melatonin gets through, but the detection challenge highlights just how trace-level these concentrations are.

For the polyphenols that may matter more than the melatonin itself, the picture is somewhat better. Anthocyanins and procyanidins are more robust during processing, though heat and light do degrade them to some degree. Concentrated tart cherry juice and dried tart cherry powder, the forms typically used in research, retain meaningful levels of these compounds. Eating whole tart cherries would also deliver them, though you would need to eat quite a lot to match the concentrated juice doses used in trials.

Who Might Benefit

The existing studies skew heavily toward older adults with insomnia, and the results are strongest in that group. The trial showing an 85-minute increase in sleep time specifically enrolled older adults who had trouble sleeping.⁷ The pilot study that found reduced time awake after sleep onset also focused on older adults with insomnia, and the researchers explicitly compared the effect sizes to other natural sleep aids, finding them in the same ballpark as valerian and some melatonin supplement studies.⁶

If you are a younger adult who generally sleeps well but is looking for a marginal boost, the evidence for cherry juice is thin. The study in healthy young adults showed a measurable rise in melatonin metabolites, but the sleep improvements in that study were more modest and involved self-reported measures rather than objective polysomnography.⁸ People with severe sleep disorders like obstructive sleep apnea or restless leg syndrome should not expect cherry juice to address those conditions, which have mechanical or neurological causes that polyphenols and trace melatonin would not touch.

Practical Considerations and Common Misconceptions

The biggest misconception about cherries and sleep is that they work as a natural melatonin delivery system. The internet is full of claims like “cherries are one of the few natural sources of melatonin,” which is technically true but deeply misleading. Many foods contain melatonin, including grains, nuts, tomatoes, peppers, and mushrooms. Breakfast cereal topped one large food database at nearly 170 nanograms per gram, far exceeding cherries.² Cherries are not special for their melatonin content. If anything, they are special for their polyphenol profile, which is what the mechanistic research points to as the more likely driver of any sleep effects.

Another common misunderstanding is conflating sweet cherries with tart cherries. The tart cherry juice used in studies is not the same as Bing cherry juice or dried sweet cherry snacks. Montmorency tart cherries are sour, rarely eaten fresh, and mostly sold as juice concentrate, frozen, or dried. If a product label says “cherry juice” without specifying tart or Montmorency, it is probably sweet cherry juice, which has not been studied for sleep.

On dosage, the studies generally used about 240 milliliters (8 ounces) of tart cherry juice twice a day, often for two weeks. That is a considerable amount of juice, and it comes with calories and sugar. One serving of tart cherry juice concentrate mixed with water can contain 25 to 30 grams of sugar. For people watching their carbohydrate intake or managing blood sugar, this is not trivial. Capsules of tart cherry extract are available and would sidestep the sugar issue, but the clinical trials have mostly used juice, so it is not clear that capsules deliver the same combination of compounds in the same bioavailable form.

Why Melatonin Levels Vary So Much Between Cherry Varieties

The wide range in melatonin measurements across cherry cultivars is not just random noise. Research on sweet cherry fruit has shown that melatonin production in the cherry itself appears to function primarily as an antioxidant defense rather than having anything to do with the plant’s circadian rhythm. Darkness and oxidative stress both triggered melatonin synthesis in cherries, creating two peaks of production during a 24-hour period. When cherries were exposed to high temperatures or intense light, markers of oxidative damage rose, and melatonin production ramped up in response.¹⁰

This means that the same variety of cherry grown in different climates, harvested at different times of day, or picked at different stages of ripeness could have substantially different melatonin levels. The Burlat cultivar that showed the highest melatonin in one study was measured at a specific time and place. The same cultivar grown elsewhere might yield a different number. This biological variability makes it essentially impossible to know how much melatonin is in the specific cherries you eat, and it is one more reason the “cherries as melatonin source” framing does not hold up well. You cannot dose yourself with melatonin through cherries in any reliable way.

The relationship between serotonin and melatonin in cherries adds another layer. In the study of eight cultivars, the researchers observed an inverse relationship: varieties high in melatonin tended to be low in serotonin, and vice versa.¹ Since serotonin is a precursor to melatonin, this suggests that in some cultivars the conversion pathway is more active, depleting serotonin to produce melatonin, while in others the pathway stalls at serotonin. From the plant’s perspective, both compounds serve protective roles. From a human nutrition perspective, it means the cherry you eat is delivering a shifting cocktail of neuroactive compounds depending on genetics and growing conditions.

How Dietary Melatonin Fits Into Your Overall Intake

Your body produces its own melatonin every night, typically in the range of about 10 to 80 micrograms depending on your age, with production declining as you get older. One large dietary study estimated that the average daily melatonin intake from food was about 25.5 micrograms, with men consuming slightly more than women due to higher overall food intake.² That total dietary intake comes from everything you eat across the day, not from any single food. Cherries contribute a small fraction of that total unless you are drinking large amounts of concentrated juice.

Whether dietary melatonin from food at these levels meaningfully affects sleep is still debated. The amounts are orders of magnitude below supplement doses, but dietary melatonin arrives alongside other bioactive compounds and in a food matrix that may affect absorption differently than a pill. Some researchers have proposed that the combination of melatonin with polyphenols, fiber, and other nutrients in whole foods could have effects that neither component would have alone. That is a plausible hypothesis, but it has not been tested rigorously enough to draw firm conclusions. For now, if you enjoy tart cherry juice and find that it helps you sleep, the evidence supports that you are probably not imagining it, but the benefit is likely modest and driven by the overall chemistry of the juice rather than its melatonin content specifically.

1
European Food Research and Technology. Detection and quantification of melatonin and serotonin in eight Sweet Cherry cultivars (Prunus avium L.)
2
PubMed Central. The Content of Dietary Melatonin in 119 Food Items and Its Relationship With Chronic Diseases: Results of the CUME+ Study
3
PubMed Central. Pilot Study of Tart Cherry Juice for the Treatment of Insomnia and Investigation of Mechanisms – Section: INTRODUCTION
4
PubMed Central. Pilot Study of Tart Cherry Juice for the Treatment of Insomnia and Investigation of Mechanisms – Section: Results
5
PubMed Central. The Effect of Tart Cherry on Sleep Quality and Sleep Disorders: A Systematic Review
6
PubMed Central. Effects of a tart cherry juice beverage on the sleep of older adults with insomnia: a pilot study
7
The FASEB Journal. Tart cherry juice increases sleep time in older adults with insomnia
8
PubMed. Effect of tart cherry juice (Prunus cerasus) on melatonin levels and enhanced sleep quality
9
Cornell University. Effect of Processing on Quality and Safety of Cherry Juice and its By-Products
10
PubMed. Melatonin and its potential biological functions in the fruits of sweet cherry