Selenium-based refers to products or technologies that utilize selenium, a chemical element known for its antioxidant properties. In the context of health, selenium is essential for various bodily functions, including metabolism and immune response. It is commonly found in foods like nuts, seafood, and grains. In the realm of technology, selenium-based often pertains to Selenium, an open-source software testing framework. This tool is widely used for automating web applications, allowing developers to write tests in various programming languages. It helps ensure that websites function correctly across different browsers and platforms.