Melatonin Suppression

Articles tagged with "Melatonin Suppression".

Blue Light at 460nm Suppresses Melatonin Most Effectively

Tags: Melatonin Suppression, Blue Light, Light Spectrum, Circadian Lighting

October 22, 2025

Which Wavelength of Light Most Effectively Suppresses Melatonin?

Blue light at 460 nanometers is the most effective wavelength for suppressing melatonin production, according to precise spectral analysis research. This study mapped the complete “action spectrum” for melatonin suppression, revealing that the circadian system’s sensitivity peaks sharply at this specific blue wavelength—distinct from the wavelengths that optimize vision. The research provides the scientific foundation for designing lighting that either promotes or prevents melatonin production, depending on the time of day and desired circadian effect.

Room Light Before Bedtime Suppresses Melatonin and Shortens Sleep Duration

Tags: Room Light, Melatonin Suppression, Bedtime Lighting, Sleep Disruption

October 22, 2025

Does Normal Room Lighting Before Bedtime Affect Your Sleep Hormones?

Yes, and the impact is more significant than most people realize. This controlled study found that exposure to typical room lighting (approximately 200 lux) before bedtime suppresses melatonin onset by 90 minutes and shortens the total duration of melatonin production by 90 minutes. Even this relatively modest light exposure—equivalent to a well-lit living room or bedroom—significantly disrupts the natural rise in melatonin that prepares your body for sleep, demonstrating that our modern lighting environments may be chronically interfering with healthy sleep preparation.

Room Light Before Bedtime Suppresses Melatonin: Extended Analysis of Light Exposure Effects

Tags: Light Exposure, Melatonin Suppression, Circadian Rhythm, Sleep Onset, Bedtime Lighting

October 22, 2025

How Much Does Room Light Before Bedtime Actually Suppress Melatonin Production?

Extended analysis reveals that even moderate room light exposure before bedtime significantly suppresses melatonin production in a dose-dependent manner, with profound effects on sleep onset and circadian timing. The research found that typical indoor lighting levels (150-200 lux) suppress melatonin production by 50-70% within 2 hours of exposure, while brighter room lighting (300+ lux) can suppress melatonin by up to 90%. Even relatively dim lighting (50-100 lux) reduces melatonin production by 20-30%, demonstrating that the human circadian system is exquisitely sensitive to light exposure during the evening hours. The study reveals that melatonin suppression begins within 15 minutes of light exposure and persists for 1-2 hours after lights are turned off, significantly delaying sleep onset and disrupting natural circadian rhythms.