- New study links melatonin and heart failure, but experts say don’t panic yet The Washington Post
 - What taking melatonin could reveal about your heart health NBC News
 - Long-term use of melatonin supplements to support sleep may have negative health effects www.heart.org
 - Long-term use of melatonin supplements linked to higher risk of heart failure and death News-Medical
 - Long-Term Melatonin Might Harm Heart Health, Study Says U.S. News & World Report
 
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