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 ...

Melatonin supplements, widely used to tackle insomnia and irregular sleep cycles, may not be as harmless as many believe, with new research raising concerns over prolonged use. Melatonin is a ...

A large-scale study presented at the American Heart Association's (AHA) Scientific Sessions 2025 revealed a significant ...

It can acutely raise blood glucose levels by suppressing insulin secretion, but in the long term, it may confer metabolic benefits.

Many people think of melatonin as a natural nod-off aid, kind of like chamomile tea in pill form. Even the name of the popular dietary supplement sounds sleepy — that long “o” sound almost makes you ...

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 ...

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 ...

Move over, melatonin.

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 ...

Melatonin reportedly has a role in the treatment of osteoporosis (López-Muñoz et al., 2022). Reiter, a major researcher in this field, and his colleagues refer to melatonin as a "disease-deferring" ...