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Pineal hormone regulates the rhythm of sleep-wakefulness, has a wide range of additional effects. Also known as the sleep hormone.
This is a special substance that is produced in the body only during sleep. Its lack leads to insomnia, irritability, fatigue and disruption of the circadian rhythm.
AllNutrition - Melatonin Dietary Supplement - Melatonin, known as the "sleep hormone".