A Review on Free Radicals and Antioxidants

Infect Disord Drug Targets. 2020;20(1):16-26. doi: 10.2174/1871526518666180628124323.


Free radicals are generated in our body by several systems. A balance among free radicals and antioxidants is an important matter for appropriate physiological function. If free radicals become greater than the ability of the body to control them, a case known as oxidative stress appears, as a result of that, a number of human diseases spread in the body. Antioxidants can contribute to facingthis oxidative stress. The present review provides a brief overview of free radicals, oxidative stress, some natural antioxidants and the relationship between them.

Keywords: Free radicals; ROS; antioxidant flavonoids; antioxidant peptides; antioxidant vitamins; oxidative stress..

Publication types

  • Review

MeSH terms

  • Antioxidants / pharmacology*
  • Antioxidants / therapeutic use
  • Free Radicals / adverse effects*
  • Humans
  • Oxidative Stress / drug effects
  • Reactive Oxygen Species / metabolism


  • Antioxidants
  • Free Radicals
  • Reactive Oxygen Species