TOXIC OXYGEN RADICALS. “Notably, dampened melatonin secretion caused by sleep disruption may increase reactive oxygen species (ROS) levels and reactive nitrogen species (RNS) production, as suggested by studies in night-shift workers.”
https://www.nature.com/articles/s41591-018-0271-8?fbclid=IwAR01C2Z4J5lxVYDLhxIb9dPb3fhNSZSxwimZvhHaJ4n3-nVPpkt2PNqoukk