Separating fact from rumor
If you’re dealing with insomnia and you’ve taken melatonin as a sleep aid, you’re not alone. It’s a popular over-the-counter supplement that many people swear by. But recent rumblings about its safety for your health might be making you toss and turn.It’s important to clear up one thing right off the bat:
There are currently no proven links between melatonin supplements and heart
disease or problems. So, you can rest a little easier if you’ve been worried.
But that doesn’t mean melatonin is risk-free — or even the
right solution for your needs.
Cardiologist Michael Hill, MD, walks us through the research.
Does melatonin use cause heart failure?
There’s no clear evidence that melatonin causes heart failure.
So, why the chatter? It’s because researchers found possible links between
melatonin and heart failure. They used a health records database to compare two
groups of adults with insomnia — those who took melatonin for at least one
year, and those who didn’t.
They found that within a five-year period, the melatonin
group had higher rates of:
- Heart
failure
- Hospitalization
for heart failure
- Death
from any cause
“These are striking findings, and that’s why they made
headlines,” Dr. Hill acknowledges. “But there are some important caveats.”
Dr. Hill explains:
- There’s
no proof that melatonin caused heart failure: The
research makes associations, but it doesn’t prove causation. That’s a huge
distinction. It means there are patterns, but there’s no proof that
melatonin is the driving factor.
- The
findings aren’t peer-reviewed: “This is a research abstract, meaning a
presentation of preliminary data,” Dr. Hill notes. “It must go through
rigorous peer review before we accept the findings as fact.”
- Gaps
remain: Because these are early findings, we don’t know the factors,
like melatonin supplement dosage or treatments given to the non-melatonin
group. We also don’t know if some people had sleep apnea or other
diagnoses.
- Heart
failure can cause sleep issues: It’s possible that some study
participants had issues because they were already in the
early stages of heart failure and didn’t yet have a diagnosis. That would
add more gray area to the findings.
“Based on the information available so far, we can’t say
that melatonin causes heart failure,” Dr. Hill clarifies. “But the topic is on
our radar, and we’ll continue learning.”
















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