Vitamins and Antioxidants

Antioxidants and vitamins in clinical conditions.

Various reactive oxygen species (ROS) may be produced from normal biochemical, essential metabolic processes or from external sources as exposure to a variety of agents presented in the environment. Lipids, proteins, carbohydrates and DNA are all capable of reacting with ROS and can be implicated in etiology of various human disorders (rheumatoid arthritis, reperfusion injury, atherosclerosis, ...

Vitamins and minerals functioning as antioxidants with supplementation considerations

Free radicals are atoms or molecules containing one or more unpaired electrons, making them very “reactive” (Surai, 2003). Biologically relevant free radicals are activated atoms or groups of atoms (usually containing oxygen or nitrogen) with an odd (unpaired) number of electrons. In a non-radical compound, all orbits are occupied by two electrons. When a chemical reaction breaks the bonds that...

Dietary intake of natural antioxidants: vitamins and polyphenols.

Oxidative stress is a condition in which oxidant metabolites exert their toxic effect because of an increased production or an altered cellular mechanism of protection; oxidative stress is rapidly gaining recognition as a key phenomenon in chronic diseases. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions by being oxidize...

Vitamins and antioxidants in the management of male fertility

[Vitamins and antioxidants in age-related macular degeneration].

The author describes biochemical and structural effects of vitamins and antioxidants on the retina. The main substances present in diet food and vitamin supplies involved in the genesis of age-related macular degeneration are shown. Also reports on the outcomes of prospective studies related to the subject, by literature review are presented.