Melatonin is necessary for regulating the human sleep-wake cycle

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Current scientific literature consistently demonstrates that melatonin acts as a crucial neurohormone and circadian synchronizer that plays a central role in regulating the human sleep-wake cycle.

The analysis

The retrieved papers uniformly support the claim that melatonin is an essential neurohormone and regulator of circadian rhythms and the sleep-wake cycle, with multiple reviews highlighting its role in maintaining circadian synchrony and facilitating sleep onset.

Evidence for · 3

Effects of melatonin on the circadian functions of sleep-wake cycle, metabolism, hormonal regulation and immune activity: A recent review

Recorded source metadata

Bugra Sarisozen, Feyza Sule Aslan, Enes Akyuz. Effects of melatonin on the circadian functions of sleep-wake cycle, metabolism, hormonal regulation and immune activity: A recent review. 2023. https://doi.org/10.32794/mr112500154

This review highlights that melatonin acts as a molecular regulator of the circadian clock and that the sleep-wake cycle depends on melatonin levels.

Source citation format

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More for · 2

Melatonin and sleep: Exploring its role in regulating the circadian rhythm and sleep-wake cycle

Recorded source metadata

Pinaki D. Wani. Melatonin and sleep: Exploring its role in regulating the circadian rhythm and sleep-wake cycle. 2026. https://doi.org/10.4103/jfmpc.jfmpc_150_25

This paper notes that melatonin plays a pivotal role in modulating circadian rhythms and facilitating sleep onset and maintenance.

Source citation format

Rhythms of life: melatonin, nutrition, sleep, and antioxidant strategies for healthy aging.

Recorded source metadata

Drăgoi CM, Dumitrescu IB, Nicolae AC. Rhythms of life: melatonin, nutrition, sleep, and antioxidant strategies for healthy aging.. 2026. https://doi.org/10.3389/fnins.2026.1736978

This review emphasizes that melatonin serves as the primary hormonal signal of darkness and plays a central role in maintaining circadian synchrony and regulating sleep.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8101 Aug 2026

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