About The Author

Laura Niedernhofer is an aging and DNA repair researcher at The Scripps Research Institute | scripps · Department of Metabolism and Aging.


Oxidative Stress And Aging

In the mid-1950s, Dr. Denham Harman, MD, Ph.D., proposed the free radical theory of aging while a resident in internal medicine. Dr. Harman had studied chemistry and physics at UC Berkeley, medicine at Stanford, and worked for Shell Oil where he exploited free radical chemistry to kill flies (patenting the Shell No-Pest Strip). Harman’s theory