Reactive oxygen species (ROS), aerobic organisms, are active products continuously produced in the process of their own metabolism due to the stimulation of internal and external environment. In general, the body has a set of antioxidant defense system to maintain the REDOX balance. The strength of antioxidant status of the body defense system is closely related to the health degree, and its scavenging mechanism can be roughly divided into enzymatic antioxidants and non-enzymatic antioxidants. The total antioxidant status of a system is reflected by the total level of various antioxidant macromolecules, antioxidant small molecules and enzymes.
