Melatonin - sleep cycles Russel J. Reiter
https://www.youtube.com/watch?v=I7YIRqTNmuY&t=1s
For a lot more details mitochondria health Melatonin: Regulation of Biomolecular Condensates in Neurodegenerative Disorders
https://www.mdpi.com/2076-3921/10/9/1483/htm