Background: In many mammals, the duration of the nocturnal melatonin elevation regulates seasonal changes in reproductive hormones such as luteinizing hormone (LH). Melatonin's effects on human ...

Medically reviewed by Violetta Shamilova, PharmD Key Takeaways Melatonin is a natural sleep hormone produced at night. It is ...

Move over, melatonin.

Domenico Fetti, "Sleeping Girl," circa 1615. Museum of Fine Arts, Budapest Source: Wikimedia Commons/Public Domain. Legendary accounts of those who remain asleep for years fascinate us. There is ...

Melatonin is a hormone associated with our sleep-wake cycles, with levels increasing as the sun goes down. For this reason, it’s a popular sleep supplement for adults and children alike, perceived as ...

Melatonin causes side effects like dizziness, headaches, nausea, and next-day drowsiness. It can also cause less-common side effects like anxiety, confusion, abdominal pain, and more. Melatonin can ...

The weighted blanket has risen in popularity in the past few years, with manufacturers and users touting its benefits, including helping with sleep and anxiety issues. A recent small study suggests a ...

A new study raises safety concerns about long-term use of melatonin supplements by those with insomnia, noting that it appears to be associated with increased risk of heart failure. But while urging ...

The 20 participants completing the study had a mean age of 59 years (range 51–69). As expected due to random group assignment, baseline values of urinary LH excretion among the 3 groups were not ...

The weighted blanket has risen in popularity in the past few years, with manufacturers and users touting its benefits, including helping with sleep and anxiety issues. A recent study suggests a ...