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Melatonin: The Hormone of Darkness and Morning Sun
Melatonin plays a crucial role in regulating mitochondrial processes such as autophagy and apoptosis. It is produced in the morning sun and helps with sleep issues like insomnia by repairing damage from artificial blue light. Low melatonin levels indicate suboptimal mitochondrial function, which can be assessed through the cortisol-melatonin assay. Melatonin is considered the opposite of cortisol due to its beneficial effects on cells.