Foods containing melatonin, serotonin, tryptophan and other sleep-related nutrients may help reinforce the body’s natural sleep-wake cycle, although researchers say larger studies are still needed.
By yourNEWS Media Newsroom
Melatonin is best known as a hormone that helps signal when the body should prepare for sleep, but it is also found naturally in several foods that may support sleep quality without requiring high-dose supplements.
The pineal gland produces melatonin in response to darkness, helping regulate the body’s circadian rhythm and normal sleep-wake cycle, according to an article by Willow Tohi on NaturalNews.com [1]. Artificial lighting, nighttime screen use and other features of modern life may suppress that natural production, the article stated.
Light inhibits melatonin release, while darkness encourages it, making a dark sleeping environment an important part of supporting the body’s normal nighttime rhythm, according to “The Complete Fibromyalgia Health Diet Guide” [2].
A July 2026 report published by mindbodygreen examined foods that naturally contain melatonin or nutrients involved in its production. The report suggested that obtaining these compounds through food may help increase circulating melatonin levels while avoiding some of the concerns associated with taking large supplemental doses.
Certain foods also provide serotonin and tryptophan, both of which participate in processes connected to relaxation, sleep and regulation of the body’s internal clock, according to an article by Kevin Hughes on NaturalNews.com [3].
Dietary sources do not necessarily deliver melatonin in amounts comparable to supplements. Their potential benefits may instead come from a combination of melatonin, amino acids, vitamins, fatty acids, antioxidants and other compounds that work together to support sleep.
Walnuts are among the foods receiving increased attention.
They naturally contain melatonin as well as tryptophan, an amino acid the body uses in the production of serotonin and melatonin, according to the mindbodygreen report.
A 2025 randomized crossover trial involving 76 young adults examined the effects of eating 1.4 ounces, or 40 grams, of walnuts each day for eight weeks. Participants showed increased markers of melatonin production and reported taking less time to fall asleep, experiencing better overall sleep quality and having less daytime sleepiness, according to the report.
Researchers cautioned that the study did not establish whether melatonin alone produced those effects. Walnuts contain a wide range of nutrients that may also have contributed.
In addition to melatonin and tryptophan, walnuts provide omega-3 fatty acids, antioxidants, fiber and essential minerals, according to an article by Patrick Lewis on NaturalNews.com [4].
The book “Eat for Extraordinary Health Healing” also identifies walnuts as a food that may support sleep because they contain melatonin, serotonin and polyphenols [5].
The findings suggest walnuts could be a practical evening food for some people, but researchers said additional work is needed to separate the effects of melatonin from the nut’s broader nutritional profile.
Tart cherries are another frequently studied dietary source.
They contain naturally occurring melatonin and are rich in polyphenols, including anthocyanins, according to the mindbodygreen report. Those compounds may help support the sleep-wake cycle while also contributing to recovery and antioxidant activity.
Studies involving tart cherry juice have reported possible improvements in sleep duration and sleep quality, although the results have not been consistent across all research.
Another limitation is the quantity required. The amount of tart cherry products used in studies may be difficult to obtain by eating a normal serving of whole fruit, the report stated.
Montmorency tart cherries contain approximately 0.1 to 0.3 milligram of melatonin per serving, according to “The Green Pharmacy Guide to Healing Foods” [6]. The book states that melatonin at that level has demonstrated sleep-inducing activity.
Tart cherries also provide vitamin C and other nutrients, according to an article by Laura Harris on NaturalNews.com [7].
Kiwi may support sleep through a somewhat different combination of compounds.
The fruit contains melatonin and serotonin, both of which are involved in regulating sleep and wakefulness, according to the mindbodygreen report.
One small study cited in the report found that participants who ate two kiwis approximately one hour before bedtime for several weeks experienced improvements in the time required to fall asleep and the total amount of time they remained asleep.
The findings were encouraging, but researchers said the study was too limited to establish exactly how kiwi produced the reported effects.
Kiwi is also included among foods containing melatonin, serotonin and tryptophan in the NaturalNews.com article by Hughes [3].
Because the fruit is nutrient-dense and relatively easy to include in an evening snack, it may offer a food-based option for people seeking to support sleep through diet. The evidence, however, remains preliminary.
Fatty fish may also benefit sleep, although researchers believe its effect likely extends beyond melatonin.
Salmon, sardines and other fatty fish are among the leading animal-based sources of dietary melatonin, according to the mindbodygreen report.
A randomized controlled trial found that participants who ate Atlantic salmon three times per week over a period of several months experienced improvements in sleep and daytime functioning.
Researchers pointed to vitamin D and omega-3 fatty acids as likely contributors. Both nutrients appear to participate in biological processes involved in sleep regulation.
The NaturalNews.com article by Hughes also lists fatty fish among foods that may help regulate sleep cycles [3].
That combination of melatonin, vitamin D, omega-3 fats and protein makes fatty fish one of the more nutritionally complex foods included in the report. Its potential effect on sleep cannot be attributed to melatonin alone.
Eggs provide another group of sleep-related nutrients.
They contain small quantities of melatonin and are a source of tryptophan, which the body needs to produce serotonin and melatonin, according to the mindbodygreen report.
The amount of melatonin found in eggs is unlikely by itself to produce a strong sleep-inducing effect. Eggs may nevertheless contribute to an overall eating pattern that provides adequate protein and nutrients needed for normal neurotransmitter and hormone production.
Tryptophan consumed with carbohydrates may be absorbed more effectively into the brain, according to “Nutrition and the Mind: How What You Eat Affects Your Mental Health” [8].
Vitamin B6 also acts as a cofactor for enzymes involved in converting tryptophan into serotonin, according to “Depression Free for Life” [9].
That means the usefulness of tryptophan-containing foods may depend partly on what they are eaten with and whether the overall diet supplies the vitamins and nutrients needed for those conversion pathways.
The broader evidence does not suggest that any single food should be viewed as a treatment for insomnia or another sleep disorder.
Studies of walnuts, kiwi, tart cherries and fatty fish have generally involved relatively small groups, specific serving sizes and limited study periods. Results may not apply equally to every person, and researchers have not fully established which compounds are responsible for reported improvements.
The mindbodygreen report concluded that foods containing melatonin and related nutrients may offer a gentler way to support circadian function than relying exclusively on supplements.
Supplements can deliver much larger amounts of melatonin than food and may affect the body differently. The NaturalNews.com article by Tohi stated that supplemental use can sometimes interfere with the body’s own production [1].
Walnuts, tart cherries, kiwi, fatty fish and eggs may instead provide smaller amounts alongside protein, healthy fats, fiber, vitamins, antioxidants and amino acids.
Food is only one part of maintaining healthy melatonin production.
Keeping a consistent sleep schedule, reducing blue-light exposure during the evening and receiving sunlight early in the day may also help reinforce the body’s circadian rhythm, according to the article by Tohi [1].
Sleeping in a dark room can further support the normal rise in melatonin that occurs after sunset.
People experiencing persistent difficulty falling asleep, staying asleep or functioning during the day should consult a healthcare professional. Dietary changes may complement healthy sleep habits, but they do not replace medical evaluation when sleep problems are frequent, severe or related to an underlying condition.
Current research suggests that melatonin-containing foods may play a supportive role, particularly when they are included as part of a balanced diet and paired with consistent nighttime habits. The strongest conclusion, however, is that their effects are likely produced by several nutrients working together rather than by dietary melatonin alone.
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