Selenium is widely used in the electronics industry, especially in the production of semiconductor devices and photocells. It plays a key role in solar panels due to its photoconductive properties, helping convert sunlight into electrical energy. Selenium is also used as an additive in glass manufacturing to decolorize glass or to give it a deep red color, depending on the form and amount used. In metallurgy, it improves the machinability of certain metal alloys, particularly in lead-free brasses used for plumbing fixtures. Additionally, selenium compounds are used in some types of pigments for ceramics, paints, and plastics, providing vibrant red and orange hues. In small amounts, selenium is essential for human health and is included in dietary supplements and fortified foods. It is also used in anti-dandruff shampoos, such as those containing selenium disulfide, to control scalp fungus and reduce flaking.