What Really Happens When You Take Melatonin Every Night: What Research Says About Risks and Alternatives
Melatonin has long been framed as a low-risk solution for sleepless nights. New preliminary research, however, is adding nuance to that perception — suggesting extended use may be associated with more serious health outcomes than many people realize.
A Closer Look At The Data
In a study of more than 130,000 adults with chronic insomnia, those who used melatonin for at least a year experienced significantly worse outcomes over time. Compared to non-users, they were nearly twice as likely to develop heart failure, about 3.5 times more likely to be hospitalized for it and roughly twice as likely to die from any cause within five years, according to the American Heart Association.
The findings were presented at the American Heart Association’s Scientific Sessions 2025 but have not yet been peer-reviewed and cannot establish cause and effect. One important limitation: over-the-counter melatonin use is difficult to track in the U.S., so real-world exposure may differ from what was captured in the data.
Researchers say the results warrant closer attention to both prescribed and self-directed, long-term use.
Why “Natural” Doesn’t Always Mean Consistent
Melatonin’s widespread appeal is partly rooted in its “natural” label. But unlike prescription medications, it is sold as a dietary supplement, meaning it is not regulated by the FDA for consistent dosage or purity.
That lack of oversight can lead to wide variability. One study of 31 supplements found actual melatonin content varied significantly from what was listed on the label, meaning a standard dose may not be as predictable as it seems.
Growing Use Among Children Raises Separate Concerns
Melatonin use has also increased among children and teens, prompting concern among pediatric experts.
The American Academy of Pediatrics does not recommend routine melatonin use in healthy children and advises that it only be used in consultation with a pediatrician. Between 2012 and 2021, there was a 530% rise in calls to U.S. Poison Control Centers for pediatric melatonin ingestions, resulting in 27,795 emergency room visits, 4,097 hospitalizations and 2 deaths — many tied to accidental overconsumption of gummy products.
Because melatonin functions as a hormone, researchers are also examining its potential effects on developing endocrine systems, including possible impacts on puberty timing. The International Pediatric Sleep Association’s 2025 expert consensus guidelines recommend treating melatonin as a medication rather than a casual supplement in children, with use guided by a clinician.
The Habit-Forming Side Of Sleep Aids
Melatonin does not appear to cause physical dependence or withdrawal the way some prescription sleep medications do, per the Cleveland Clinic. Still, long-term use can create a psychological reliance, where people feel they cannot fall asleep without it.
Some users also report diminished effects over time. Taking periodic breaks — for example, a few nights off each week — may help reduce the likelihood of mild tolerance build up.
What To Consider Instead
For chronic insomnia, the American Academy of Sleep Medicine recommends CBT-I (Cognitive Behavioral Therapy for Insomnia) as a first-line treatment, ahead of supplements or medication.
There is also evidence behind a few alternatives. Magnesium glycinate has been associated with improved sleep quality in some adults. A Louisiana State University study found that participants who drank tart cherry juice twice daily slept an average of 84 minutes longer per night. Herbal options like chamomile may offer mild calming effects as well.
Still, foundational sleep habits remain the most reliable approach. Maintaining a consistent sleep schedule, limiting screen exposure before bed, keeping the bedroom cool and dark and avoiding caffeine late in the day can all make a meaningful difference.
Bottom Line
This research does not prove that melatonin causes heart failure or increased mortality. But it does challenge the idea that long-term use is risk-free. Given how widely it’s used — including among children — it may be worth rethinking how often and how long it’s part of a nightly routine, and discussing it with a healthcare provider.
This article was created by content specialists using various tools, including AI.
This story was originally published April 15, 2026 at 3:16 PM with the headline "What Really Happens When You Take Melatonin Every Night: What Research Says About Risks and Alternatives."
