The Gummy Medicine Cabinet: Pediatric Risks of OTC Supplements

Why “Natural” Products Still Require Adult Supervision

Have you walked through Costco or a grocery store lately? The shelves are filled with “natural” supplements marketed to children, many with packaging, colors, and gummy formulations that look more like the candy aisle than medicine. Yet natural does not mean safe, and nutraceuticals are biologically active substances with widespread physiological effects.

Based on data from the National Health and Nutrition Examination Survey for the most recent three cycles—2015–2016, 2017–2020, and 2021–2023—35% of children and adolescents used dietary supplements, with rates of melatonin, probiotics, and fiber use in particular increasing.

Melatonin: From Sleep Aid to Poison Control Calls

The most dramatic trend has been the surge in pediatric melatonin ingestions, which increased by 530% from 2012 to 2021. Fortunately, most exposures were mild, with the CDC reporting that 98% resulted in minimal or no symptoms.

Despite this generally benign profile, the rapid increase in unintentional ingestions—particularly among young children consuming gummies and chewable formulations—has led to a sharp rise in pediatric emergency department visits.

The main toxicity symptoms of melatonin overdose are related to excess central nervous system depression and sedation. Children who ingested melatonin gummies had significantly higher odds of developing symptoms and requiring ED evaluation compared to exposures involving other gummy products.² A CDC emergency department study estimated approximately 10,930 ED visits for unsupervised melatonin ingestions among children aged 5 years and younger between 2019 and 2022. Although 93.5% were not hospitalized, at least half of these ED visits involved flavored products such as gummies or chewable tablets, which can easily resemble candy.

Serious outcomes, while rare, have been documented. Between 2012 and 2021, poison center data included more than 4,097 hospitalizations, 287 ICU admissions, 5 children requiring mechanical ventilation, and 2 deaths.³

One complicating factor is that many melatonin gummies contain inaccurate doses or additional substances such as CBD, serotonin, botanicals, or antihistamines. Some studies found actual melatonin content ranging from far below to several times higher than the labeled amount, especially in gummies. So even if a child receives a supervised dose of melatonin, the dose may exceed what is intended, and the actual ingredients may be unknown.

Clinically, the message is clear: most pediatric melatonin ingestions are benign, but the sheer volume of exposures has increased dramatically, and rare but serious outcomes—including respiratory failure and death—have been reported. The most important prevention strategy is to treat melatonin like any other medication: store it in child-resistant containers, avoid bedside storage, and minimize use of candy-like formulations whenever possible. Purchasing a quality melatonin product is a further precaution to ensure that the label accurately reflects the dose and contents.

Beyond Sleep Gummies: Other OTC Supplement Toxicities

Micronutrients—multivitamins, iron, vitamin D, magnesium, calcium, and potassium—account for approximately 62% of all unsupervised pediatric supplement ingestions presenting to EDs.⁴

Iron remains a particularly concerning agent due to its high acute toxicity potential. Australian poison center data (2014–2019) showed iron exposures increasing 14% per year, with 38% of iron cases requiring hospitalization—a substantially higher rate than other supplement types. Toddlers (1–4 years) accounted for 41.5% of all vitamin/mineral supplement exposure calls.⁵ In the U.S., iron was the second most commonly implicated supplement in unsupervised pediatric ingestions despite being the only supplement category requiring child-resistant packaging. The toxicity can affect the gastrointestinal tract, cardiovascular system, liver, and cellular metabolism. Early symptoms are dominated by severe GI symptoms, including abdominal pain, vomiting, diarrhea, lethargy, and gastrointestinal bleeding.

Over-the-counter supplement ingestion patterns vary significantly by age group. In young children, particularly those under age five, most ingestions are accidental and involve gummy or chewable products that resemble candy, with melatonin now among the most commonly reported substances to poison control centers.

School-aged children may begin taking supplements more intentionally for sleep, focus, immunity, sports performance, or mood, often influenced by family wellness culture or social media.

In adolescents, supplement use becomes even more complex, with increasing self-directed use of products marketed for energy, weight loss, muscle building, cognition, or emotional health. Teenagers are also at greater risk for excessive dosing, combining multiple products, stimulant-containing supplements, and intentional misuse. In particular, once children reached adolescence, iron, zinc, probiotics, and weight-loss supplements were more often used by girls, while melatonin and bodybuilding supplements were used more often by boys.

Conclusion

Across all age groups, the widespread perception that OTC supplements are “natural” and therefore harmless can obscure the reality that these products are biologically active substances capable of causing toxicity, drug interactions, and serious medical consequences when used without appropriate supervision. Even relatively safe substances can become dangerous when children ingest large amounts accidentally. Unlike prescription medications, supplements are not FDA-approved before marketing. Independent testing has repeatedly found inaccurate ingredient amounts, contamination, variable potency, and undeclared substances.

As the use of nutraceuticals continues to expand in modern wellness culture, parents and clinicians alike must approach these products with the same respect, caution, and supervision given to any biologically active treatment.