[ Reactive oxygen species, ROS ]
Chemically reactive chemical species containing oxygen.
ROS are a natural byproduct of the [ Metabolism ] The enzyme-catalyzed, chemical processes that occur within the cells of living organisms in order to sustain life. More of oxygen. They have roles in cell signalling and maintaining homeostasis.
Exposure to heat, UV light or ionising radiation can significantly increate ROS levels, resulting in cumulative structural damage known as oxidative stress.