Free Radicals in Exhaustive Physical Exercise: Mechanism of Production, and Protection by Antioxidants

Free Radicals, Antioxidants and Disease

Living cells continually generate free radicals or reactive oxygen species (ROS) through the respiratory chain during energetic metabolism. ROS can either be harmful or play important physiological roles in our body. Besides being produced during normal cell metabolism there are numerous exogenous factors, such as irradiation by UV light, X-rays, gamma-rays, and atmospheric pollutants which may...

Free radicals, oxidants, and antioxidants.

Free radicals are species with one or more unpaired electrons. The unpaired electron results in a species that is often highly reactive. Free radicals have a wide range of reactions; two broad classes of reactions are electron transfer and addition reactions resulting in covalent bond formation. Free radicals can be classified as reducing (donating an electron to an acceptor) or oxidizing (acce...

Free Radicals, Antioxidants in Disease and Health

Free radicals and oxidants play a dual role as both toxic and beneficial compounds, since they can be either harmful or helpful to the body. They are produced either from normal cell metabolisms in situ or from external sources (pollution, cigarette smoke, radiation, medication). When an overload of free radicals cannot gradually be destroyed, their accumulation in the body generates a phenomen...

free radicals and antioxidants “oxidative stress” in cadmium exposure workers

oxidative stress arises when there is a marked imbalance between the production and removal of reactive oxygen species that may lead to several diseases. cadmium is an environmental and industrial pollutant that results in formation of free radicals. the aim of this study was to determine the oxidative stress status in cadmium exposure workers. this is a cross-sectional study of 36 people of ca...

Interaction between antioxidants and free radicals