What effect does selenium have on oxidative stress in cells?

Selenium plays a pivotal role in cellular health primarily through its function as an antioxidant. In the context of oxidative stress, selenium is a crucial component of several selenoproteins that contribute to the body's antioxidant defense system. Specifically, these selenoproteins, including glutathione peroxidases, help to neutralize reactive oxygen species (ROS) and protect cells from oxidative damage caused by oxidative stress. By doing so, selenium aids in maintaining cellular integrity and overall health, potentially reducing the risk of chronic diseases associated with high oxidative stress levels.

The ability of selenium to scavenge free radicals and prevent cellular damage underscores its importance in nutrition and health. This antioxidant action is vital for supporting the body's capability to mitigate the impacts of oxidative stress, thus reinforcing why selenium's primary effect in this context is recognized as acting as an antioxidant.