The reduction of o2 can result in dangerous side reactions that produce, for example, superoxide and peroxide. such species are collectively referred to as

Reactive Oxygen Species (ROS).

Explanation:

Peroxide, superoxide, hydroxyl radical, singlet oxygen and alpha-oxygen conform a group of chemically reactive species containing oxygen, they are collectible known as Reactive Oxygen Species (ROS). These reactive species are big contributors to the oxidative stress in the human body, they can even damage DNA.

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