Mindful MeridianPineal Gland
Melatonin and the Pineal Gland
How the pineal gland produces melatonin and how light and darkness shape circadian timing.
Medical note: This article is educational and not medical advice. Dietary supplements can interact with medicines and may not be appropriate for everyone. Seek professional care for persistent, progressive, sudden or concerning symptoms.
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The basic relationship
The pineal gland produces melatonin, a hormone involved in circadian timing. Melatonin levels are generally higher at night and lower during daylight.
Light is a key signal
The daily light-dark cycle helps regulate melatonin production. This is one reason evening light exposure and irregular schedules can affect circadian timing.
Melatonin is not the whole story of sleep
Sleep is influenced by many biological and behavioral factors. Melatonin acts as a timing signal; it is not simply an on/off switch for sleep.
Do pineal supplements increase melatonin?
That is a product-specific question. A supplement's marketing language should not be treated as proof that it changes endogenous melatonin production in a meaningful clinical way.