Melatonin may not universally improve sleep quality, but it could benefit some individuals by lowering core body temperature, which is essential for inducing sleepiness. The discussion highlights the intriguing relationship between temperature regulation and sleep, suggesting that variations in body temperature could be a powerful lever for enhancing sleep states. Despite its popularity as a sleep aid, the actual efficacy of melatonin remains debated, potentially pointing to a significant placebo effect at play.