Melatonin is the most widely used sleep supplement in the world, but most people take it wrong. A 2024 dose-response meta-analysis of 26 RCTs clarifies exactly what dose and timing actually maximize its effect on sleep onset and total sleep time.

A new clinical trial put magnesium bisglycinate to the test against insomnia. Here's what 155 adults actually experienced after four weeks, and who's most likely to see results.