Melatonin is suppressed by rod-based illuminance in humans.
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D002940:Circadian Rhythm; D006801:Humans; D008027:Light; D008550:Melatonin / Q000032:analysis*; D010870:Pineal Gland / Q000502:physiology*; D017948:Retinal Rod Photoreceptor Cells / Q000502:physiology*
D008550:Melatonin