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Antioxidants are reducing agents, and limit oxidative damage to biological structures by passivating them from free radicals. [ 4 ] Strictly speaking, the free radical theory is only concerned with free radicals such as superoxide ( O 2 − ), but it has since been expanded to encompass oxidative damage from other reactive oxygen species (ROS ...
Antioxidants that are reducing agents can also act as pro-oxidants. For example, vitamin C has antioxidant activity when it reduces oxidizing substances such as hydrogen peroxide; [93] however, it will also reduce metal ions such as iron and copper [94] that generate free radicals through the Fenton reaction.
Free radicals, reactive chemicals that damage our cells, are believed to contribute to cancer development. Antioxidants protect the body from the harmful effects of free radicals by bolstering ...
Free radical mechanisms in tissue injury. Lipid peroxidation induced by xenobiotics and the subsequent detoxification by cellular enzymes (termination). Antioxidants play a crucial role in mitigating lipid peroxidation by neutralizing free radicals, thereby halting radical chain reactions. Key antioxidants include vitamin C and vitamin E. [8]
It is an antioxidant in plants, animals, fungi, and some bacteria and archaea. Glutathione is capable of preventing damage to important cellular components caused by sources such as reactive oxygen species, free radicals, peroxides, lipid peroxides, and heavy metals. [2]
Oxidative stress mechanisms in tissue injury. Free radical toxicity induced by xenobiotics and the subsequent detoxification by cellular enzymes (termination).. Oxidative stress reflects an imbalance between the systemic manifestation of reactive oxygen species and a biological system's ability to readily detoxify the reactive intermediates or to repair the resulting damage. [1]
Matcha is packed with antioxidants like EGCG, which help fight free radicals and support your immune system. It’s also anti-inflammatory and can promote a calm, focused energy.
The regulation theory considers a polyphenolic ability to scavenge free radicals and up-regulate certain metal chelation reactions. [1] Various reactive oxygen species, such as singlet oxygen, peroxynitrite and hydrogen peroxide, must be continually removed from cells to maintain healthy metabolic function.