How selenium fights oxidative stress
In a recent science paper called “Selenium Status in the Elderly People: Longevity and Age-Related Diseases”, Irish, French, and Belgian researchers looked specifically at selenium and its inherent ability to protect against oxidative stress.
Their paper, which was published in Current Pharmaceutical Design last year, describes how selenium helps to support a variety of selenium-dependent enzymes called selenoproteins that protect cells against the perils of oxidative stress.
Protects healthy cells
Basically, oxidative stress is a situation where the body is overwhelmed by an overrepresentation of potentially harmful, tissue-scavenging free molecules, which can destroy health cells and lead to physical deterioration.
Free radicals are a normal byproduct of cellular energy metabolism and the body is normally able to handle them, so they do not cause harm. It is our built-in defense mechanisms that take care of the job. However, as we grow older, these mechanisms tend to deteriorate and slow down, and if there is too little selenium in the blood to fuel the protective selenoproteins, they may not be able to carry out their assigned tasks.