Is melatonin safe for kids? 4–12 years?

What the evidence says

Melatonin is a hormone your body makes naturally to help you feel sleepy at night. Many parents give store-bought melatonin to help kids fall asleep faster, and research generally shows it works reasonably well for short periods with mild side effects like morning grogginess, headache, or vivid dreams.

Here's an important Canadian detail: Health Canada has not approved any melatonin product for children 11 and younger. Products are only licensed for kids 12 and up. This doesn't mean it's dangerous, but it does mean there's no officially approved dose or quality standard for younger kids, and store-bought supplements can vary a lot in actual melatonin content.

The Canadian Paediatric Society has looked at the research and found that melatonin helps kids fall asleep with few side effects in short studies. But they also point out that nobody has studied what happens with months or years of regular use, so long-term safety is still unknown.

The biggest real safety concern right now isn't the hormone itself at normal doses — it's accidental overdose. Melatonin gummies look like candy, and poison control centres have seen a huge jump in calls about kids getting into bottles and eating way more than intended. Store melatonin like any medicine, out of reach and sight.

If your child is 4 to 12 and struggling with sleep, talk to your doctor first. They can rule out other causes, suggest a safe starting dose, and help you use melatonin as a short-term tool alongside a good bedtime routine rather than a long-term fix.