Chocolates, gummies, and jellies—melatonin supplements are everywhere and they are popular among parents who struggle to get their kids to sleep. According to a 2024 study, published in JAMA Pediatrics, 68% of school-aged children and 34% of preteens in the US admitted to have taken melatonin in the past 30 days. Amidst it's growing popularity, a new study has raised alarm. Conducted by researchers in US government, this study has found that these supplements contain a lot more of this hormone than what has been claimed by their manufacturers.But What Is Melatonin?Melatonin—a hormone manufactured naturally in the body—regulates your sleep. Its production is triggered by darkness, while light reduces its production, prompting wakefulness. People who are insomniac or have trouble sleeping have low levels of this hormone and often turn to melatonin supplements. Melatonin also binds to receptors in your brain to reduce nerve activity. it can also reduce levels of dopamine and is involved in some aspects of day night cycles of our eyes. While supplements have become popular, there are natural food sources of Melatonin like walnuts, grapes, oats, tart cherries, cow milk amongst others.Study Discovered Inaccurate Labeling On Most ProductsThe study was conducted by researchers at the US Food and Drug Administration (FDA) who were motivated to conduct a study to better understand the marketplace of the widely used supplement. For the study, researchers purchased melatonin products between May and September 2023 from Walgreens, CVS, Walmart, Target, GNC, or Amazon. All these supplements, out of which 70% were marketed for the kids, were tested for the amount of melatonin they actually contained.They found that only half of the products contained the amount of melatonin suggested by the package, and two items contained none at all. One of the sample had a staggering 667% of the dosage listed on the packaging. While the average dosage of 1.7 milligrams (mg) per serving fell within safe limits for pediatric consumption, the highest dose tested—50 mg per serving—far exceeded recommended levels for children.This research builds on previous findings including smaller studies that indicated that most melatonin supplements were inaccurately labeled. This study raises a very important flag for much-needed regulations concerning supplement standard testing to make sure labelling is accurate and safe for pediatric products," Sham Singh, MD, a sleep expert and psychiatrist at WINIT Clinic, told Health.Do Melatonin Supplements Really Help?There is strong evidence that suggests that taking melatonin before bed decreases the time taken to fall asleep, a concept called sleep latency, by 3 minutes. It also increased sleep time by about 30 minutes. A similar analysis of 23 studies on individuals with disease-related sleep disorders found that melatonin supplements significantly decreased sleep disturbances and sleep latency while improving both sleep duration and quality. However, while this review concluded that melatonin pills did not benefit those with mental disorders or neurological conditions like Alzheimer’s disease, other research has suggested otherwise.