Melatonin in kids: review flags evidence gaps, poisonings
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- Judith Owens and colleagues at Boston Children's Hospital published a narrative review in the World Journal of Pediatrics documenting a sharp mismatch between widespread pediatric melatonin use and the limited long-term clinical evidence behind it.
- Melatonin shows clear short-term benefits for children with autism and ADHD — faster sleep onset and longer total sleep time — but evidence for typically developing children is limited, inconsistent, and concentrated in short trials of older kids.
- Commercial melatonin supplements were found to contain several times the labeled dose in some cases, and testing also detected unexpected compounds such as serotonin, raising product-quality concerns.
- Pediatric poison control centers have recorded a sharp rise in accidental melatonin ingestions, with young children — often attracted to candy-like gummy formulations stored within reach — appearing especially vulnerable.
- Long-term safety data remain especially thin, leaving unanswered questions about melatonin's potential effects on puberty, immune function, metabolism, and neurological development with extended use.
- Researchers recommend keeping behavioral strategies — consistent bedtime routines, limited screen exposure, age-appropriate sleep expectations — as the first-line treatment, and reserving melatonin for the lowest effective dose, limited duration, and medical supervision.
- Melatonin is a hormone that influences the immune system, metabolism, and reproductive processes, not just sleep cycles, a biological fact the review says both clinicians and parents tend to overlook when treating it as a harmless supplement.
Why it matters: Millions of families already give children melatonin bought over the counter, but the only robust evidence covers kids with autism or ADHD — and commercial products can contain several times the dose on the label, with accidental poisonings rising among young children who mistake gummies for candy. The review's call to make behavioral sleep strategies the default and tighten supplement oversight directly targets a practice that has outpaced the science.
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