The Brief

A preliminary study suggests a popular sleep aid could have negative effects on heart health, the American Heart Association said this week.

Here’s what to know about what the study is saying about melatonin and heart failure:

Melatonin and heart failure

Big picture view:

Long-term use of melatonin was associated with a higher risk of heart failure diagnosis, according to a preliminary study announced this week by the American Heart Association.

Dig deeper:

Researchers looked at five years of health data for adults with insomnia who had long-term melatonin use (12 months or more) in their records, compared to the data of other adults who had insomnia but no melatonin use in their records.

Findings:

The data analysis found:

What they're saying:

"Melatonin supplem

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