Advances in Free Radical Biology & Medicine 

TL;DR: Evidence is presented which supports the importance of vitamin C as a component of the overall antioxidant protective mechanisms found in cells and tissues and the protection by vitamin C of phagocytic cells involved in the defense against pathogen invasion.

TL;DR: In this article, the Gibb energy changes with the help of reduction potentials were calculated for reactions involving oxyradicals, and the results regarding reactions involving H and O containing species are quite rigorous, while conclusions regarding organic radicals are more tentative.

TL;DR: The evidence for the involvement of free radicals in some of the later events associated with carcinogenesis, namely, tumor promotion, are reviewed.

TL;DR: The retina is quite sensitive to damage by elevated or prolonged light exposure; however, a free-radical role in light damage to the retina has not been established, and an alternative mechanism for damage due to vitamin E deficiency and light is considered, which involves elevated vitamin A levels and vitamin A toxicity.

TL;DR: The present review discusses hiological and toxicological aspects of quinone metabolism, and physical and chemical data are considered in order to attempt to explain the physiological effects.