What is the harmful form of oxygen in the human body?

The harmful form of oxygen in the human body is known as reactive oxygen species (ROS). These highly reactive molecules can lead to oxidative stress, which damages cellular components such as proteins, lipids, and DNA. This damage is associated with various health issues, including inflammation, aging, and chronic diseases like cancer and cardiovascular disorders. Antioxidants in the body help neutralize ROS, mitigating their harmful effects.