Oxidative stress occurs when an oxygen molecule splits into single atoms with unpaired electrons, which are called free radicals.
Antioxidants are substances that can prevent or slow damage to cells caused by free radicals, unstable molecules that the body produces as a reaction to environmental and other pressures.
Your immune system is important for maintaining your overall health. It works to detect and neutralise foreign invaders, such as infectious microbes and even cancer cells. When this happens, inflammation can occur.