23 Feb 2026
25m

#125 - Melatonin Explained

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The Matt Walker Podcast

Melatonin functions as a "chronobiotic"—a biological clock whisperer—rather than a sedative for inducing sleep. Misunderstandings regarding its purpose often lead to suboptimal usage, as many people incorrectly take it immediately before bed. To effectively shift the circadian rhythm, melatonin should be administered three to four hours before the desired sleep time. While it offers only modest benefits for chronic insomnia, it serves as a powerful tool for managing jet lag and circadian rhythm disorders. Recent observational data suggesting a potential link between long-term melatonin use and heart failure warrants caution, though these findings remain preliminary and require further investigation. Ultimately, behavioral interventions like cognitive behavioral therapy for insomnia remain the gold standard, while melatonin should be reserved for targeted timing adjustments rather than serving as a primary sleep-generation solution.

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