Melatonin overuse of Americans could lead to health issues, according to a new study.

The study published Tuesday in the medical journal JAMA found Americans took more than twice the amount of melatonin recommended in 2018 than a decade earlier.

Experts say using melatonin occasionally is fine.

But high levels of use are linked to dementia, early mortality and other health complications.

The Food and Drug Administration doesn't regulate the pills so they could have harmful additives or more melatonin than indicated.